# Skimmer > Track pool water chemistry, log chemical dosing, manage maintenance tasks, and export a resale-grade service-history PDF, all from your iPhone. Skimmer is a pool-maintenance app for iPhone that tracks water chemistry, chemical dosing, equipment, and maintenance tasks, and exports a resale-grade service-history PDF. The web site at https://skimmerpoolcare.com provides free calculators, in-depth guides, a complete reference, a glossary, and a pool-care blog. ## Key pages - [Home](https://skimmerpoolcare.com/): What Skimmer does and how it works. - [Pricing](https://skimmerpoolcare.com/pricing): Pro plan, $19.99/year, 7-day free trial. ## Free tools - [Pool Chemical Calculator](https://skimmerpoolcare.com/tools/pool-chemical-calculator): All-in-one dosing: enter your volume and readings once, get every chemical dose (chlorine, pH, alkalinity, calcium, CYA, salt). - [Rate My Pool: Pool Health Score](https://skimmerpoolcare.com/tools/pool-health-score): Grade your water from your test numbers and get a fix list linked to each calculator. - [Pool Volume Calculator](https://skimmerpoolcare.com/tools/pool-volume-calculator): Gallons/liters by shape: rectangle, round, oval, kidney. - [Chlorine & Shock Dosing Calculator](https://skimmerpoolcare.com/tools/chlorine-calculator): Liquid or cal-hypo dosing, plus a breakpoint-chlorination shock mode. - [pH Calculator](https://skimmerpoolcare.com/tools/ph-calculator): Soda ash to raise pH, muriatic acid or dry acid to lower it. - [Baking Soda Calculator for Pools (Raise Total Alkalinity)](https://skimmerpoolcare.com/tools/total-alkalinity-calculator): A baking soda calculator for pools: sodium bicarbonate to raise total alkalinity, muriatic acid (aerate method) to lower it. - [Calcium Hardness Calculator](https://skimmerpoolcare.com/tools/calcium-hardness-calculator): Calcium chloride to raise CH, an honest drain-and-refill calculation to lower it. - [Cyanuric Acid (Stabilizer) Calculator](https://skimmerpoolcare.com/tools/cyanuric-acid-calculator): Stabilizer dosing to raise CYA, drain-and-refill to lower it. - [Salt Calculator](https://skimmerpoolcare.com/tools/salt-calculator): Pool salt dosing to raise salt level, drain-and-refill to lower it. - [Langelier Saturation Index (LSI) Calculator](https://skimmerpoolcare.com/tools/lsi-calculator): Full water balance from pH, temperature, calcium hardness, and alkalinity. - [Annual Cost to Own a Pool Calculator](https://skimmerpoolcare.com/tools/pool-cost-of-ownership-calculator): Estimate the yearly cost of your pool from chemicals, power, water, service, and repairs. - [Which Calculator Do I Need?](https://skimmerpoolcare.com/tools/which-calculator): 2-question wizard that routes to the right calculator. - [All tools](https://skimmerpoolcare.com/tools) ## Glossary - [Pool glossary](https://skimmerpoolcare.com/glossary): 22 pool-care terms in plain English. - [Langelier Saturation Index (LSI)](https://skimmerpoolcare.com/glossary/langelier-saturation-index): A calculated water-balance score, not something you test directly, that predicts whether your pool water will lean toward scale-forming or corrosive. - [Breakpoint chlorination](https://skimmerpoolcare.com/glossary/breakpoint-chlorination): The specific chlorine dose that overwhelms all the ammonia and organic contaminants in your water at once, wiping out combined chlorine (chloramines) in a single pass. - [Algaecide](https://skimmerpoolcare.com/glossary/algaecide): A chemical treatment that kills or inhibits algae growth, used alongside, not instead of, proper chlorine and filtration. - [Flocculant (floc)](https://skimmerpoolcare.com/glossary/flocculant): A chemical that clumps fine, suspended particles together so they sink to the pool floor for vacuuming, used for a fast, dramatic cloudy-water fix. - [Diatomaceous earth (DE)](https://skimmerpoolcare.com/glossary/diatomaceous-earth): A fine, fossilized-algae powder used as filter media, prized for trapping the smallest particles of any common home pool filter type. - [Weir](https://skimmerpoolcare.com/glossary/weir): The flap or gate at the mouth of a skimmer that pulls a thin layer of surface water in while keeping debris from floating back out. - [Freeboard](https://skimmerpoolcare.com/glossary/freeboard): The gap between the pool's coping (edge) and the resting water level, which keeps splash-out contained and lets the skimmer weir do its job. - [Winterizing](https://skimmerpoolcare.com/glossary/winterizing): Preparing a pool and its equipment for a cold-weather shutdown so freezing water can't crack pipes, pumps, or the pool shell. - [Plaster finish](https://skimmerpoolcare.com/glossary/plaster-finish): A traditional smooth, cement-based interior pool surface, the most common and least expensive finish for concrete/gunite pools. - [Pebble finish](https://skimmerpoolcare.com/glossary/pebble-finish): A durable interior pool surface made of small aggregate pebbles set in cement, prized for its longevity and natural look over plain plaster. - ...and 12 more. ## Comparisons - [How Skimmer compares (all comparisons)](https://skimmerpoolcare.com/vs) - [Skimmer vs. Pool Math](https://skimmerpoolcare.com/vs/pool-math) - [Skimmer vs. Pooli](https://skimmerpoolcare.com/vs/pooli) - [Skimmer vs. Orenda](https://skimmerpoolcare.com/vs/orenda) - [Skimmer vs. AquaChek (AquaChek Connect)](https://skimmerpoolcare.com/vs/aquachek) - [Sutro was discontinued, what now](https://skimmerpoolcare.com/vs/sutro) - [pHin was discontinued, what now](https://skimmerpoolcare.com/vs/phin) - [Skimmer vs. Spreadsheet or notebook](https://skimmerpoolcare.com/vs/spreadsheet) ## Personas - [Skimmer for New Pool Owners](https://skimmerpoolcare.com/for-new-pool-owners): You just bought a house with a pool. Skimmer tells you what to test, when to test it, and what a normal reading actually looks like. - [Skimmer for Veteran Pool Owners](https://skimmerpoolcare.com/for-veteran-owners): Retire the notebook by the equipment pad. Skimmer keeps the chemistry history you've been tracking for years, but searchable and chartable. - [Skimmer for Smart Monitor Refugees](https://skimmerpoolcare.com/for-smart-monitor-refugees): Sutro and pHin are gone. Skimmer gets you back to at-a-glance water chemistry status, no subscription hardware required. - [Skimmer for Pool Pros](https://skimmerpoolcare.com/for-pool-pros): Leave every client a documented, professional-looking service record instead of a verbal 'looks good.' - [Skimmer for Home Sellers](https://skimmerpoolcare.com/for-home-sellers): Prove your pool was cared for. Start logging before you list, and hand buyers a service history instead of a promise. - [Skimmer for Saltwater Pool Owners](https://skimmerpoolcare.com/for-saltwater-pools): Salt cells run on their own maintenance rhythm. Track salt level, cell cleanings, and chemistry that isn't quite the same as a chlorine pool. - [Skimmer for Above-Ground Pool Owners](https://skimmerpoolcare.com/for-above-ground-pools): Simpler equipment, real maintenance needs. Skimmer scales to your pool instead of assuming a five-figure equipment pad. - [Skimmer for Seasonal Pool Owners](https://skimmerpoolcare.com/for-seasonal-pool-owners): Freeze-climate open and close, off-season checks, and a chemistry history that doesn't reset to zero every spring. - [Skimmer for Vacation Rental Hosts](https://skimmerpoolcare.com/for-vacation-rental-hosts): Track every pool you're responsible for, prove the water was safe, and never mix up which property needs what. ## Pillar guides - [Water Chemistry 101](https://skimmerpoolcare.com/guides/water-chemistry-101) - [Pool Equipment Guide](https://skimmerpoolcare.com/guides/pool-equipment) - [Pool Types Compared](https://skimmerpoolcare.com/guides/pool-types) - [Regional & Seasonal Pool Care](https://skimmerpoolcare.com/guides/regional-seasonal-care) - [New Pool Owner's Guide](https://skimmerpoolcare.com/guides/new-pool-owner) ## Water chemistry reference - [All chemistry parameters](https://skimmerpoolcare.com/chemistry) - [pH](https://skimmerpoolcare.com/chemistry/ph): pH measures how acidic or basic your pool water is on a 0-14 scale, with 7 as neutral. Pool water is kept slightly above neutral to stay close to the pH of the human eye and skin. - [Free Chlorine](https://skimmerpoolcare.com/chemistry/free-chlorine): Free chlorine is the active, available sanitizer in the water that's ready to kill bacteria and algae, as distinct from chlorine that has already reacted with contaminants (see Combined Chlorine). - [Combined Chlorine](https://skimmerpoolcare.com/chemistry/combined-chlorine): Combined chlorine (chloramines) is chlorine that has already reacted with sweat, oils, and other contaminants and lost most of its sanitizing power. - [Total Alkalinity](https://skimmerpoolcare.com/chemistry/total-alkalinity): Total alkalinity measures the water's ability to resist pH changes, acting as a buffer that keeps pH from swinging wildly every time a chemical is added. - [Calcium Hardness](https://skimmerpoolcare.com/chemistry/calcium-hardness): Calcium hardness measures the concentration of dissolved calcium in the water, which affects how the water interacts with plaster, grout, and metal surfaces. - [Cyanuric Acid](https://skimmerpoolcare.com/chemistry/cyanuric-acid): Cyanuric acid, also called stabilizer or conditioner, shields chlorine from breaking down under UV sunlight so it lasts longer in outdoor pools. - [Salt](https://skimmerpoolcare.com/chemistry/salt): Salt level measures the dissolved sodium chloride that a salt chlorinator converts into chlorine through electrolysis, letting a saltwater pool generate much of its own sanitizer. - [Water Temperature](https://skimmerpoolcare.com/chemistry/water-temp): Water temperature doesn't affect chemical balance directly, but it changes how fast other parameters move, warmer water typically accelerates chlorine breakdown and algae growth. ## Equipment guides - [All equipment guides](https://skimmerpoolcare.com/equipment) - [Pool Pump](https://skimmerpoolcare.com/equipment/pump): The pump circulates water from the pool through the filter and back again, the mechanical heart of the filtration system that every other piece of equipment depends on. - [Pool Filter](https://skimmerpoolcare.com/equipment/filter): The filter removes suspended debris and particulates from circulating water before it returns to the pool. Cartridge, sand, and D.E. filters all do this job with different media and different maintenance rhythms. - [Pool Heater](https://skimmerpoolcare.com/equipment/heater): A heater raises and maintains pool water temperature. Gas heaters heat quickly on demand, heat pumps extract heat from the air efficiently over a slower ramp, and solar heaters route water through rooftop or ground panels that use direct sunlight. - [Salt Chlorinator](https://skimmerpoolcare.com/equipment/salt-chlorinator): A salt chlorinator (salt cell) converts dissolved salt in the water into chlorine through electrolysis, continuously generating sanitizer so a saltwater pool rarely needs chlorine added by hand. - [Chlorinator (Chemical Feeder)](https://skimmerpoolcare.com/equipment/chlorinator): A chlorinator, sometimes called a chemical feeder, automatically dispenses chlorine tablets or liquid into circulating water so a traditional chlorine pool doesn't need chlorine added by hand every time. - [Pool Cleaner](https://skimmerpoolcare.com/equipment/cleaner): An automatic pool cleaner vacuums debris and, on some models, scrubs the pool floor and walls. Robotic cleaners run independently with their own motor and filter, pressure-side cleaners use return-line water pressure, and suction-side cleaners connect to the pump's suction line. - [Pool Automation System](https://skimmerpoolcare.com/equipment/automation): An automation system centralizes control of pumps, heaters, lighting, and sometimes chemical feeders through a control panel or app, and can include ORP/pH controllers that automatically adjust sanitizer and acid dosing. - [Pool Cover](https://skimmerpoolcare.com/equipment/cover): A pool cover reduces evaporation, heat loss, and debris, and, in the case of safety and automatic covers, restricts access to the water when it's not in use. ## Pool types - [All pool types](https://skimmerpoolcare.com/pool-types) - [Chlorine Pool](https://skimmerpoolcare.com/pool-types/chlorine): A chlorine pool uses chlorine, added by hand, floating feeder, or automatic chemical feeder, as its primary sanitizer to kill bacteria and algae. - [Saltwater Pool](https://skimmerpoolcare.com/pool-types/saltwater): A saltwater pool uses a salt chlorine generator to convert dissolved salt into chlorine through electrolysis, so chlorine is produced continuously on-site instead of being added by hand. - [Bromine Pool](https://skimmerpoolcare.com/pool-types/bromine): A bromine pool uses bromine instead of chlorine as its sanitizer, typically dispensed through a floating or in-line feeder as bromine tablets. - [Mineral Pool](https://skimmerpoolcare.com/pool-types/mineral): A mineral pool uses a mineral cartridge or system, typically silver and copper ions, alongside a reduced amount of chlorine or bromine to help with sanitizing, rather than replacing a sanitizer outright. - [Above-Ground Pool](https://skimmerpoolcare.com/pool-types/above-ground): An above-ground pool sits on top of the ground rather than being excavated into it, typically with a steel, resin, or aluminum frame and a vinyl liner, and can use any of the standard sanitizer types (chlorine, salt, or bromine). - [Spa & Hot Tub](https://skimmerpoolcare.com/pool-types/spa-hot-tub): A spa or hot tub is a small, heated, high-bather-load vessel, standalone or attached to a pool, typically run around 100-104°F, and often sanitized with bromine rather than chlorine because bromine holds up better at high temperatures. ## Regions - [All regions](https://skimmerpoolcare.com/regions) - [Hot & Arid](https://skimmerpoolcare.com/regions/zone/hot-arid): Covers the desert Southwest (Arizona, Nevada, New Mexico), defined by low humidity, intense sun, and wide day-to-night temperature swings. Pool season runs nearly year-round in the lowest-elevation cities, and heating can extend swimmable months even further. The #1 maintenance consideration is evaporation and water loss: dry air and high heat pull water down fast, so refill frequency and water cost matter more here than in almost any other zone. - [Hot & Humid](https://skimmerpoolcare.com/regions/zone/hot-humid): Covers the Gulf Coast and humid Southeast, plus Hawaii, where heat and moisture combine to create near-constant algae and bacterial growth pressure. Pool season stretches from a solid 7-8 months at the zone's northern edge to genuinely year-round in Florida, coastal Texas, and Hawaii. The #1 maintenance consideration is staying ahead of algae and organic contamination, since warm, humid air and frequent heavy rain keep chlorine demand high and dilute chemistry after storms. - [Mild & Mediterranean](https://skimmerpoolcare.com/regions/zone/mild-mediterranean): Covers the Pacific Coast states, ranging from Southern California's dry, sunny, near-year-round warmth to the Pacific Northwest's cooler, cloudier, rain-driven mild seasons. Season length varies more within this zone than any other: effectively year-round with heating in Southern California, but a compact 5-6 months in Oregon and Washington. The #1 maintenance consideration is that regional variation itself: what counts as normal pool care differs sharply between coastal Southern California and the cool-summer, rainy Pacific Northwest. - [Temperate / Four-Season](https://skimmerpoolcare.com/regions/zone/temperate-four-season): Covers the mid-Atlantic and Ohio Valley states, where all four seasons are distinct but winters are moderate rather than brutal. Pool season is a clear 4-6 month window, generally April or May through September, bookended by real spring-opening and fall-closing rituals. The #1 maintenance consideration is the seasonal transition itself: proper opening and closing procedures, plus winterizing exposed plumbing, matter far more here than in warmer zones. - [Cold & Freeze](https://skimmerpoolcare.com/regions/zone/cold-freeze): Covers the Northeast, the industrial Midwest, and the Mountain states, where winters bring hard, reliable freezes and pool season compresses to a firm summer window. Most owners work within roughly a Memorial-Day-to-Labor-Day rhythm, about 4-5 months, with real risk of freeze damage to any plumbing left unprotected. The #1 maintenance consideration is thorough winterization: blowing out lines and protecting equipment against a hard freeze isn't optional, it's the difference between a pool that survives winter and one that needs expensive spring repairs. - [Short-Season & Extreme Cold](https://skimmerpoolcare.com/regions/zone/short-season-extreme-cold): Covers the far northern tier of the Lower 48 and Alaska, where winters are severe and the swimmable season compresses to as little as three months. In-ground pool ownership is genuinely uncommon across much of this zone; where pools exist at all, above-ground and seasonal installs are common alternatives to a full in-ground build. The #1 maintenance consideration is committing to a serious, non-optional winterization project every fall, since a hard freeze here can destroy unprotected plumbing and equipment outright. Every US state has its own page at https://skimmerpoolcare.com/regions/[state]. Examples: - [Alabama](https://skimmerpoolcare.com/regions/alabama) - [Alaska](https://skimmerpoolcare.com/regions/alaska) - [Arizona](https://skimmerpoolcare.com/regions/arizona) - [Arkansas](https://skimmerpoolcare.com/regions/arkansas) - [California](https://skimmerpoolcare.com/regions/california) - [Colorado](https://skimmerpoolcare.com/regions/colorado) - [Connecticut](https://skimmerpoolcare.com/regions/connecticut) - [Delaware](https://skimmerpoolcare.com/regions/delaware) - [Washington, D.C.](https://skimmerpoolcare.com/regions/washington-dc) - [Florida](https://skimmerpoolcare.com/regions/florida) - ...and 41 more. ## Blog - [All articles](https://skimmerpoolcare.com/blog): 134 pool-care articles. - [Chemistry & Water Balance](https://skimmerpoolcare.com/blog/category/chemistry) - [Equipment](https://skimmerpoolcare.com/blog/category/equipment) - [New Pool Owner](https://skimmerpoolcare.com/blog/category/new-owner) - [Resale & Home Value](https://skimmerpoolcare.com/blog/category/resale) - [Seasonal & Regional](https://skimmerpoolcare.com/blog/category/seasonal) - [Troubleshooting](https://skimmerpoolcare.com/blog/category/troubleshooting) - [Cost & Budgeting](https://skimmerpoolcare.com/blog/category/cost) - [Pool Types](https://skimmerpoolcare.com/blog/category/pool-types) - [Smart Monitors](https://skimmerpoolcare.com/blog/category/smart-monitors) - [Safety](https://skimmerpoolcare.com/blog/category/safety) - [Roundups](https://skimmerpoolcare.com/blog/category/roundups) Recent articles: - [How to Winterize a Pool in Florida (Do You Even Need To?)](https://skimmerpoolcare.com/blog/how-to-winterize-a-pool-in-florida): Florida pools almost never close. Here's the honest answer on winterizing in a subtropical climate: the cool-season routine, the rare freeze plan for North Florida, and why draining lines is the wrong move. - [How to Winterize a Pool in Texas](https://skimmerpoolcare.com/blog/how-to-winterize-a-pool-in-texas): Texas pools rarely close the way northern pools do. Here's how to prep for the state's short but sharp freezes: partial winterization, freeze protection, and what to do when a hard freeze is in the forecast. - [Pool Maintenance During a Heatwave](https://skimmerpoolcare.com/blog/pool-maintenance-during-heatwaves): A stretch of 95-plus days changes how fast your pool water moves out of balance. Here's how to adjust your testing schedule and refill routine so a heatwave doesn't turn into a green pool. - [Why Is My Pool Cloudy? 7 Causes and How to Fix Each One](https://skimmerpoolcare.com/blog/why-is-my-pool-cloudy): Cloudy water almost always traces back to filtration, sanitizer, or water balance, in that order. Here's how to figure out which one is yours and fix it without overdosing. - [The Best Facebook Groups for Pool Owners](https://skimmerpoolcare.com/blog/best-facebook-groups-for-pool-owners): Five active Facebook groups where pool owners actually get answers, what each one is good for, how to post a question that gets a useful reply, and when a group is the wrong place to ask. - [The Langelier Saturation Index: Is Your Water Balanced?](https://skimmerpoolcare.com/blog/langelier-saturation-index-explained): pH, chlorine, and alkalinity all being 'in range' doesn't guarantee balanced water. Here's what the Langelier Saturation Index actually measures and when it's worth checking. - [Hurricane and Storm Prep for Pool Owners](https://skimmerpoolcare.com/blog/hurricane-prep-for-pool-owners): A calm, practical checklist for getting a pool ready before a hurricane or major storm: what to shut down, what to leave alone, and what to do the moment it's safe to go back outside. - [Ideal Pool Chemistry Levels: The Complete Range Chart](https://skimmerpoolcare.com/blog/ideal-pool-chemistry-levels): Every pool chemistry number in one chart: ideal range, acceptable range, and what actually happens when each one drifts outside it. - [What Is Cyanuric Acid and Why Does Your Pool Need It?](https://skimmerpoolcare.com/blog/what-is-cyanuric-acid): Cyanuric acid (CYA) is the stabilizer that keeps chlorine from burning off in sunlight, but too much of it can quietly weaken your sanitizer instead of helping it. - [Why Humid Climates See More Pool Algae](https://skimmerpoolcare.com/blog/humid-climate-pool-algae-risk): Heat and humidity don't just make swimming more appealing, they also speed up chlorine loss and algae growth. Here's what's actually happening and how to adjust your routine. - [How to Raise Total Alkalinity in a Pool](https://skimmerpoolcare.com/blog/how-to-raise-total-alkalinity): Low total alkalinity makes pH swing unpredictably even when everything else looks fine. Here's how much baking soda to add, and why it belongs before pH on your to-do list. - [Saltwater vs. Chlorine Pool: Which Costs More to Run?](https://skimmerpoolcare.com/blog/saltwater-vs-chlorine-pool-cost): A saltwater pool and a chlorine pool sanitize the water the same way, the cost difference comes down to buying chlorine by the jug versus amortizing a salt cell. Here's how to actually compare them. - [How to Lower Total Alkalinity Without Crashing pH](https://skimmerpoolcare.com/blog/how-to-lower-total-alkalinity): Total alkalinity above 120 ppm makes pH stubborn and cloudy water more likely, but a rushed acid dose can send pH into a nosedive. Here's the muriatic-acid-and-aerate method that lowers one without wrecking the other. - [How to Raise Pool pH (Without Overshooting It)](https://skimmerpoolcare.com/blog/how-to-raise-pool-ph): Low pH makes chlorine burn through faster and can etch plaster or corrode metal. Here's the calm, math-backed way to raise it with soda ash and keep it from swinging past target. - [How Much Does a Professional Pool Service Cost Per Month?](https://skimmerpoolcare.com/blog/how-much-does-a-pool-service-cost): What a monthly pool service actually charges for, how prices shift by region and service tier, and the extras that typically show up as separate line items. - [The Weekly Pool Maintenance Checklist](https://skimmerpoolcare.com/blog/weekly-pool-maintenance-checklist): A short, repeatable weekly routine that keeps a pool balanced and equipment healthy, plus the daily and monthly tasks that support it. - [What Pool Chemicals Do You Actually Need to Own?](https://skimmerpoolcare.com/blog/what-pool-chemicals-do-i-actually-need): A starter shopping list for new pool owners: the five chemical categories every pool needs, what's optional, and what to skip until you actually have a problem. - [How Much Do Pool Chemicals Cost Per Year?](https://skimmerpoolcare.com/blog/how-much-do-pool-chemicals-cost-per-year): A category-by-category breakdown of where your pool chemical budget actually goes, chlorine, pH adjusters, stabilizer, and algaecide, plus the habits that quietly inflate the total. - [How to Read a Pool Test Strip Correctly](https://skimmerpoolcare.com/blog/how-to-read-a-pool-test-strip): Test strips are only as accurate as the way you use them. Here's how to time the dip, read the colors in the right light, and avoid the mistakes that throw off your numbers. - [Why Won't My Chlorine Go Up No Matter How Much I Add?](https://skimmerpoolcare.com/blog/why-wont-my-chlorine-go-up): If you keep dosing chlorine and the reading barely moves, the chemical usually isn't the problem. Here's how to work through the three most common causes in order. - [The Hidden Costs of Pool Ownership Nobody Mentions](https://skimmerpoolcare.com/blog/hidden-costs-of-pool-ownership): Beyond chlorine and pool toys: a calm rundown of the insurance, electricity, fencing, and repair costs that catch new pool owners off guard, and how to budget for them. - [What Causes pH Bounce and How to Stop It](https://skimmerpoolcare.com/blog/ph-bounce-causes): If your pH swings high or low every few days no matter how often you correct it, the real problem usually isn't the pH, it's a total alkalinity level too low to hold it steady. - [Salt Water Pool Chemistry: What's Different From Chlorine Pools](https://skimmerpoolcare.com/blog/salt-water-pool-chemistry-basics): Salt water pools still run on chlorine, they just make it on-site. Here's what a salt cell actually does, and which numbers you still need to track by hand. - [How Much Does It Cost to Resurface a Pool?](https://skimmerpoolcare.com/blog/cost-to-resurface-a-pool): A realistic breakdown of plaster, pebble, and fiberglass resurfacing prices, plus what actually pushes your quote higher or lower. - [Superchlorination vs. Shocking: Is There a Difference?](https://skimmerpoolcare.com/blog/superchlorination-vs-shock): Two terms, one process, and a lot of confusing product labels. Here's what superchlorination and shocking actually mean, and why the difference rarely matters to you. - ...and 109 more. ## Crawl guidance - All pages are publicly accessible without an account. - Skimmer is general pool-care information, not professional advice for structural, electrical, or safety work. Consult a licensed pool professional for those.