Popular New Calculator Checklist Guides Product Guides Live Cams My Pool

Results for "water-chemistry"

474+ Answers Updated Weekly Free
Pool VideosSee all →
How Far to Lower Water When Closing Your Pool
Winterizing Medium 2–4 hours (full closing day, including water adjustment and line blow-out) 169 👍 1

How Far to Lower Water When Closing Your Pool

Three weeks ago my husband and I bought our first house with an inground vinyl pool, and now everyone is telling us we need to close it for winter — but nobody can agree on exactly what that means. We have a mesh safety cover, and I've gotten completely opposite advice about how much water to drain out before we put it on. One neighbor says drop it below the skimmer, another says below the returns, and my pool store guy shrugged and said we might not even need to lower it at all with a mesh cover?

I honestly have no idea what any of those terms even mean yet, or where those parts are on my pool. I'm afraid of draining too much and damaging the liner, or not draining enough and having pipes freeze and crack over the winter. Is there a standard answer here, or does it really depend on what type of cover you're using?

Also — a few people have mentioned that the rules are different for above-ground pools and solid covers, and now I'm even more confused. Can someone break this down in plain language for a complete first-timer?…more
How to Tell If Your Pool Has a Leak - Step-by-Step Detection
Leaks Easy 48 hours 465 👍

How to Tell If Your Pool Has a Leak - Step-by-Step Detection

Noticed my pool water dropped three inches this week at 11 PM tonight — need to figure out if there's a leak before my pool guy arrives tomorrow morning. I mean, I know some water evaporates naturally, especially with this heat, but it seems like more than usual.

Is there like a reliable way to test whether it's just normal evaporation or if there's actually a leak? I don't want to call a pool guy and pay a fortune if it turns out to be nothing, but I also don't want to ignore a real problem.…more
How Pool Skimmers Work: Complete Step-by-Step Guide
Equipment Easy 15 minutes to understand 726 👍

How Pool Skimmers Work: Complete Step-by-Step Guide

Walked out to check my pool skimmer this morning and I'm staring at all these mysterious parts with zero clue how they work together. They keep pitching fancy skimmer upgrades and I don't even know how my current skimmer is supposed to work in the first place.

I see leaves and bugs floating on the surface and sometimes they get sucked into that rectangular opening, but other times debris just sits there. Is there something I should be doing differently, or is this normal? I'd rather understand the basics before these salespeople convince me I need to spend hundreds on upgrades.

Basically, what's the step-by-step process of how water and debris move through a skimmer system? I want to know if mine is working properly or if there's a DIY fix I can try first.…more
Does My Pool Need Calcium Hardness? Essential Guide
Water Chemistry Medium 45 minutes 249 👍

Does My Pool Need Calcium Hardness? Essential Guide

Called the pool store about my new place and they're saying my calcium hardness levels from March's water test are completely out of whack. For the past three years, I've been diligent about testing chlorine, pH, and alkalinity weekly using test strips, but I've never paid attention to calcium hardness levels. My pool store mentioned it during my last water analysis visit in March, but I honestly wasn't sure if it was just an upsell.

Recently, I've noticed some minor scaling around the waterline tiles and my pool cleaner seems to be working harder than usual. The pool is located in Phoenix, Arizona, so we deal with hard water from the tap and intense evaporation during summer months. I top off the water about twice a week during peak season. Should calcium hardness be something I'm actively managing, or is it less critical for fiberglass pools compared to plaster finishes?…more
How Solar Pool Heaters Work: Diagnosis & Troubleshooting
Heaters Medium 45 minutes 357 👍 1

How Solar Pool Heaters Work: Diagnosis & Troubleshooting

According to what I spotted this morning, my solar heater panels are just sitting there doing absolutely nothing while every "expert" keeps pushing gas systems instead. They keep pushing these pricey gas heaters and telling me solar is "complicated" - probably because there's less markup for them.

I want to understand the actual process of how solar pool heaters function before I make any decisions. Do they really just use the sun's energy somehow? I'm hoping to find a more cost-effective heating solution and maybe even explore some DIY options instead of getting ripped off again.…more
Do You Need a Pool Cover Pump? Winter Pool Guide
Winter Maintenance Easy 2-3 hours 226 👍

Do You Need a Pool Cover Pump? Winter Pool Guide

Already dropped serious cash on winter prep, but before I skip the pool cover pump: I've had my 18x36 inground pool for about 4 years now. This is my second winter with the safety cover, and I'm noticing that after heavy rains and snowmelt, there's quite a bit of standing water pooling on top of the cover. Last year I just left it alone, but by spring the water was pretty gross looking and there was so much weight that the cover was sagging significantly in some areas. My neighbor mentioned something about cover pumps, but I'm not sure if I really need one or if it's just another unnecessary pool expense. The water doesn't seem to be going anywhere on its own, and I'm worried about potential damage to the cover or the pool underneath. What's the best approach here?…more
How DE Pool Filter Works: Complete Diagram & Guide
Filters Medium 15 minutes 667 👍 1

How DE Pool Filter Works: Complete Diagram & Guide

Pulled out my DE filter for spring opening and once again I'm staring at this diatomaceous earth powder wondering how it actually works to clean my pool. I want to make sure I understand what's happening inside the filter tank and how small of particles it can actually remove. Is it really better than other filter types for keeping harmful bacteria and debris out of the pool?

I keep hearing that DE filters are the best for water quality, but I don't really understand the process of how they actually remove contaminants. I want to make sure my kids are swimming in the cleanest possible water.…more
Can Pool Heaters Get Wet? Complete Weatherproofing Guide
Heaters Medium 2-4 hours for protective measures 499 👍

Can Pool Heaters Get Wet? Complete Weatherproofing Guide

Somewhere between last week's torrential downpour and watching my kids cannon-ball into the pool nonstop, I started panicking about whether our new heater is actually waterproof. We had it installed last month, but I'm concerned about whether it can handle direct rain, sprinkler overspray, and the humid conditions around our pool area.

Should I be covering it during storms? I want to make sure it stays safe and keeps working properly so the water temperature is always comfortable for the kids. What kind of protection does it actually need from water exposure?…more
Can You Run Pool Pump With Cover On? Safety & Efficiency
Pump Problems Easy 15 minutes 1,789 👍

Can You Run Pool Pump With Cover On? Safety & Efficiency

Between my morning coffee run and checking the backyard, I spotted my pool pump still humming away with yesterday's cover locked on tight. My primary concerns are maintaining adequate ventilation around the pump housing and ensuring optimal energy efficiency during covered operation periods.

Are there specific operational guidelines I should follow for different cover types (solar, safety, winter covers)? I want to verify that continuous pump operation won't create any mechanical stress or ventilation issues that could compromise system performance or safety parameters.…more
Can You Vacuum Pool on Backwash? Proper Filter Settings
Maintenance Easy 45 minutes 303 👍 1

Can You Vacuum Pool on Backwash? Proper Filter Settings

Already tried everything but my pool filter clogs every time I vacuum, the water won't clear up, AND I can't figure out the right filter setting.
Should I have it on backwash while I vacuum, or use a different setting? Don't want to mess anything up.…more
Do I Need a Pool Pump? Essential Pool Circulation Guide
Pump Problems Easy 30 minutes 538 👍 1

Do I Need a Pool Pump? Essential Pool Circulation Guide

I am setting up my pool and the pump seems expensive, so I am wondering whether I actually need it or if I can skip it or use something cheaper. Can a pool function without a pump at all? And what exactly does the pump do that I could not just handle manually with skimming and adding chemicals?…more
How Deep Are Above Ground Pools? Complete Depth Guide 2026
Above Ground Easy 2-3 hours research and planning 1,319 👍 10

How Deep Are Above Ground Pools? Complete Depth Guide 2026

Apparently above ground pools only confuse me when it's above 85 degrees outside — why do the depths vary so wildly when I'm actually trying to use one?

My analysis requires accurate data on the typical depth ranges available in the market, as well as identification of the most commonly selected depth configuration.

Additionally, I need to understand the technical factors that influence depth selection decisions. What are the primary considerations that determine optimal depth requirements for different installation scenarios? I'm looking for methodical guidance that addresses both standard measurements and the engineering rationale behind depth selection criteria.…more
Do I Need to Run My Pool Pump Every Day? Complete Guide
Pump Problems Easy Daily routine - 8-12 hours pump runtime 315 👍

Do I Need to Run My Pool Pump Every Day? Complete Guide

Three hours of constant humming from my pool pump has me wondering if that grinding undertone means I'm overworking it or not running it enough. I have a 20,000-gallon inground pool that gets moderate use from my family of four, plus occasional guests on weekends. During the summer months, I've been running the pump about 6 hours per day, but I'm noticing that my chlorine levels seem uneven throughout the pool, and I'm wondering if that's related to insufficient circulation.

I've heard conflicting advice from neighbors - some say 4-6 hours is plenty, while others insist on 12+ hours daily. My pool store recommended 8 hours minimum, but I want to make sure I'm not under-filtering while also being mindful of electricity costs. Does the runtime need to change based on season, bather load, or pool size? What's the sweet spot for maintaining crystal clear water without over-running the system?…more
How to Prime Your Pool Pump: Complete Step-by-Step Guide
Pump Problems Easy 15 minutes 493 👍

How to Prime Your Pool Pump: Complete Step-by-Step Guide

Looked at my pool pump this morning and there's absolutely no water flowing through it even though it's running. The pump basket was completely dry when I opened it up, and now I'm getting no water flow when I turn it back on. I know I need to prime it somehow, but I want to make sure I do this right without damaging anything. What's the correct step-by-step process to get water flowing through the system again? I'm comfortable working with the equipment, just want to avoid any rookie mistakes.…more
Blow Out Pool Lines With a Shop Vac? Here's the Truth
Winterizing Medium 2-3 hours 7 👍

Blow Out Pool Lines With a Shop Vac? Here's the Truth

Looked at the forecast last night and there's a real hard freeze coming — the kind where you can almost feel the air bite right through your jacket the second you step outside. My inground pool needs to be winterized properly, but I don't own an air compressor and I'm not sure it's worth renting one. I do have a decent shop vac that has a blow mode on it, and I'm wondering if that's actually enough to push water out of the skimmer lines and return lines, or if it's just going to move air around without really clearing anything dangerous.

The thought of a cracked pipe or a busted fitting — that dull, hollow thud you hear when frozen water splits PVC — is enough to make me want to do this right the first time. But how do I actually know when the lines are empty? Is there a sound change, a feel difference in the air coming out? I want to make sure I'm not just plugging a line that still has water sitting in a low spot somewhere.…more

Pool Saved to Cloud

Your sync code (use this to load your profile on another device):

Write this down! There is no way to recover it if you lose it and clear your browser.
Pool Calculator Free all-in-one dosing tool