Results for "chlorine effectiveness"

Water Chemistry Easy 10 minutes 549 👍 2

Does Pool Stabilizer Expire? Shelf Life & Storage Guide

Found some old cyanuric acid in my pool shed and trying to decide between tossing it out and risking expired chemicals on my pool. Been there maybe 2-3 years. Granular stuff looks clumped up from humidity but wondering if it's still good to use.

Does pool stabilizer actually expire or go bad over time? Want to know if I should toss it and buy new or if it's still effective.…more

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Maintenance Easy 45 minutes 275 👍 0

Can You Shock a Pool During the Day? Complete Guide

Around midnight my pool water went from crystal clear to that nasty cloudy green mess, and the pool store insists I have to wait until evening to shock it. I've been shocking my pool during the day when I have time, but it seems like I'm going through way more chemicals than I should be.

Is there a better time to shock that would make my chemicals last longer? I'm trying to cut down on pool maintenance costs and do more of this myself instead of paying the pool guys every month.…more

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Water Chemistry Medium 4-6 hours 934 👍 19

Can I Shock Pool After Adding Baking Soda? Complete Guide

Noticed my neighbor's pool stays crystal clear when he adds baking soda then shocks immediately, but mine turns cloudy every time — what's his secret? I added baking soda to raise my alkalinity this morning, but now I'm wondering about timing.

Can I go ahead and shock the pool right away, or do I need to wait? I don't want to waste the shock treatment or mess up my water chemistry. The pool store guy mentioned something about waiting but then tried to upsell me on their "premium" shock system. Just looking for straight answers on proper timing and whether I should test anything specific before shocking.…more

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Water Chemistry Easy 30 minutes 217 👍 0

Do You Need Pool Chemicals? Essential Chemicals for Safe Water

Last weekend I grabbed my pool testing kit and decided to handle the chemistry myself — just need to figure out which chemicals are actually essential versus marketing hype. My neighbor swears by minimal chemical use while the pool store keeps pushing different products on me.

What chemicals do you ACTUALLY need to keep a pool safe for swimming? I don't want to over-treat my water with unnecessary stuff, but I also don't want anyone getting sick. Just looking for the bare minimum essentials that are truly required for safe, swimmable water.…more

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Water Chemistry Medium 45 minutes 255 👍 0

How Pool Chlorine Works: Complete Chemistry Guide 2026

Tried avoiding pool chemistry for years but finally planning to tackle understanding how chlorine actually works this Saturday — what basics should I have down first? I know chlorine kills bacteria and algae, but what's actually happening at the molecular level? Does pH really matter that much for it to work properly?

Also keep hearing about cyanuric acid affecting chlorine effectiveness. How does all this chemistry actually fit together?…more

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Water Chemistry Medium 15 minutes for testing, planning required for solutions 313 👍 0

Can You Swim in a Pool with High CYA? Safety Guide

Around two weeks after my CYA hit 80 ppm, my 20,000 gallon inground pool is eating through chlorine way faster than it should. The water looks clear and I've been maintaining my free chlorine at 3-4 ppm, but I'm having to add way more chlorine than usual to keep it there.

My main concern is whether it's actually safe for my family to swim in the pool with these high stabilizer levels. I've read conflicting information online - some sources say high CYA itself is dangerous, while others focus more on the chlorine effectiveness issue. We've got kids who use the pool daily during summer, so I want to make sure I'm not putting anyone at risk.

Should I be keeping everyone out of the water until I can get the CYA levels down, or is it more about making sure I can maintain proper sanitization despite the high stabilizer? I'm trying to figure out if this is an immediate safety concern or more of a long-term maintenance headache.…more

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Water Chemistry Medium 2-4 hours 224 👍 0

Can Pool pH Be Too High? Problems & How to Lower It

Between my pool test strips screaming dangerously high pH and my kids' eyes burning like fire every swim, something's definitely not adding up here. I tested it yesterday and it's reading around 8.0, which seems higher than normal. The water also looks a bit cloudy even though I've been adding chlorine regularly.

I'm concerned about whether it's safe for the kids to keep swimming. What problems does high pH actually cause, and how can I bring it down safely? I want to make sure the water quality is good before they get back in the pool.…more

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Water Chemistry Medium 2-4 hours 297 👍 0

Can You Shock Pool With High CYA? Safe Methods & Solutions

Between liquid chlorine and cal-hypo shock for tackling this algae mess when my cyanuric acid is already sitting at 80-90 ppm. I understand that high CYA reduces chlorine effectiveness, but I'm not sure about the correct approach for shocking under these conditions.

What's the proper methodology for calculating shock dosage when CYA is high? Should I be using a specific FC/CYA ratio, or is there a point where the CYA is too high to shock effectively? I want to ensure I'm using the right amount of chlorine without wasting chemicals or creating unsafe conditions.…more

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Filters Easy 15 minutes 246 👍 0

Do Cartridge Pool Filters Need DE? Complete Guide

During pool season, is it dangerous that I'm getting conflicting advice about using DE powder with my cartridge filters when I've got kids swimming daily? My pool store said it might help with clarity, but I'm reading mixed reviews online. I've been cleaning my cartridges regularly and they seem fine, but my water isn't crystal clear like I want it. Some people swear by adding DE to cartridge systems while others say it's pointless or even harmful. What's the real story here? Will DE actually help my filtration or am I just wasting money and potentially creating problems?…more

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Maintenance Easy 1–2 hours (setup) + ongoing management 1,012 👍 54

Ducks in Your Pool? How to Keep Them Out for Good

Three straight days of rain last week apparently convinced a pair of mallards that my backyard pool is their new favorite pond. Every morning I come out and they're splashing around on the steps and leaving droppings all along the waterline and on the surrounding deck. It's pretty gross to deal with, and I'm starting to wonder whether the water itself is even safe to swim in after all that.

I've heard mixed things about those floating alligator decoys or the big plastic swan deterrents you can buy online — do those actually work, or do ducks wise up to them pretty quickly? I'd rather not spend money on something that only works for a week before they ignore it completely.

My bigger concern right now is honestly the water safety side of things. Is duck waste a real health hazard for swimmers, or am I overthinking it? And if I do need to treat the pool after a duck visit, what's the right way to do that? We have a 20,000-gallon in-ground with a salt chlorinator if that matters.…more

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Water Chemistry Easy 15 minutes 395 👍 1

Does Pool Calcium Expire? Storage & Shelf Life Guide

Found a half-used bag of calcium hardness increaser in my garage from two seasons ago and wondering if it's still good or if I need to buy fresh. Pool supply store wants $25 for a new bag but this one's been sitting in the heat and cold — does pool calcium actually go bad?…more

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Best Pool Filters

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Filters Medium 2-4 hours 278 👍 0

Does Pool Filter Sand Type Matter? Complete Sand Guide

Last week my pool guy swore 20-silica sand is all the same, but my filter's clogging in 2 months instead of the 6-month replacement schedule everyone talks about. The guy there was trying to sell me on some fancy zeolite stuff that costs way more than regular sand.

I mean, sand is sand, right? Or does the type actually affect how well it filters and how often I'll need to backwash? Don't want to cheap out if it means dealing with cloudy water all summer, but also don't want to get upsold on something that's just marketing hype.…more

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Filters Medium 45 minutes 213 👍 0

Do I Need a Sand Filter for My Pool? Complete Guide

Since my pool water keeps turning cloudy even after cleaning, is it dangerous for my kids who swim almost daily? My pool has been a constant headache and I'm wondering if switching to a sand filter would solve my problems, or if there are better options out there.

I keep hearing different things - some people swear by sand filters because they're supposedly low-maintenance, others say cartridge or DE filters work better. My pool isn't huge but gets decent use, and honestly I just want something that actually works without me having to mess with it constantly. What's the real deal with these different filter types and how do I know which one would work best for my situation?…more

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Salt Water Medium 45 minutes 260 👍 0

Do Saltwater Pools Need Chlorine? The Complete Truth

About two weeks into this rental with my first saltwater pool and the generator's been running constantly but the water stays green no matter what I do. I've thrown every chemical I can think of at this thing - algaecide, shock, clarifier - and nothing's working.

Do saltwater pools actually need regular chlorine added, or am I missing something else? I thought the whole point was that the salt system makes its own chlorine automatically. My levels seem off but I'm not sure if I should be manually adding chlorine to a saltwater pool or if that defeats the purpose entirely.…more

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Water Chemistry Medium 45 minutes 249 👍 0

Can Pool Chlorine Make You Sick? Health Effects Explained

Opened my pool this season after adjusting pH levels, switching chlorine brands, and getting professional water testing — but my family still gets red eyes and skin irritation after swimming. We've been experiencing eye irritation and some skin redness after swimming, but I'm also worried about not having enough chlorine to kill bacteria and other nasties.

My latest test results show chlorine at around 5-6 ppm, and my CYA is sitting at about 50 ppm. I've been using liquid chlorine and shocking weekly with calcium hypochlorite. Sometimes the chlorine drops really low between treatments, maybe down to 0.5-1 ppm, especially after heavy use or rain.

What's the sweet spot for chlorine levels to avoid both chemical irritation and harmful bacteria? I want to keep everyone healthy but not sure if I should be targeting higher or lower numbers based on my current CYA level.…more

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