Results for "calcium hypochlorite"

Water Chemistry Easy 5 minutes 226 👍 0

How Is Pool Chlorine Made? Complete Manufacturing Guide

Always assumed pool chlorine was just bleach in a fancy package until my chemistry teacher neighbor said it's actually manufactured completely differently. Now I'm curious — what exactly goes into making pool chlorine and is there really a difference between the cheap and expensive stuff?…more

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Water Chemistry Medium 2-4 hours 1,775 👍 0

Do Vinyl Pools Need Calcium? Complete CH Guide 2026

Before our big pool party this Saturday, I'm getting completely contradictory advice about whether my vinyl pool even needs calcium added! I keep reading conflicting info online - some sources say vinyl pools don't need calcium at all, others say they do but at different levels than concrete pools. My test strips show I'm sitting around 100 ppm right now and I'm not sure if that's too low or if I even need to worry about it.

I've been dealing with some metal staining on my vinyl liner and wondering if low calcium could be making it worse by causing corrosion. But I'm also terrified of adding too much and ending up with scaling or that dreaded cloudy water that takes forever to clear up. What's the sweet spot for calcium hardness in vinyl pools, and is it really different from other pool types?…more

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Water Chemistry Easy 4 hours 456 👍 0

Can I Shock Pool After Adding Calcium? Safe Timing Guide

This is 11 PM and I just dumped calcium into my pool but now realize I need to shock it — can I do both tonight or will I completely wreck my water chemistry?

I just added calcium hardness increaser to bring my levels up, and now I need to shock the pool too. The pool store guy said I need to wait but couldn't give me a straight answer on how long. Can I add the shock right away or do I need to wait between adding these chemicals? I'm trying to get this done in one trip instead of paying them to come back again.…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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Water Chemistry Easy 30 minutes 1,937 👍 0

How Long to Wait Before Swimming After Pool Chemicals

Apparently I'm standing in my garage staring at three different pool chemicals I added this morning with no clue how long I actually need to wait before diving in. Yesterday I added liquid chlorine to bring my levels up from 1.2 ppm to around 3.0 ppm, and I wasn't sure if we could swim that evening or needed to wait until the next day.

I'm planning to shock the pool this weekend with calcium hypochlorite since we've had some cloudy water issues, and I also need to adjust the pH which has been running high at 7.8. The kids are eager to get back in the pool, but I want to make sure I'm following proper safety guidelines. Do different chemicals have different waiting periods, and should I always test the water first regardless of how much time has passed?…more

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Water Chemistry Medium 45 minutes 326 👍 0

Can You Use Pool Chlorine in Hot Tub? Safety & Compatibility

Replaced my hot tub chlorine with leftover pool chlorine yesterday and now the water's still cloudy even though it's burning through sanitizer like crazy. The spa chemicals at the store are ridiculously expensive compared to pool chemicals. I have a bunch of pool shock and liquid chlorine left over from summer - can I just use those in my hot tub instead? I tried using some pool shock last week but the water got really harsh and irritated everyone's skin. My spa dealer keeps pushing their expensive "spa-only" products but I'm wondering if it's just a marketing gimmick. Are pool and spa chemicals really that different, or am I missing something important here?…more

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Water Chemistry Medium 2-4 hours initial treatment 341 👍 1

Can You Shock Pool With Liquid Chlorine? Complete Guide

Replaced my pool's chlorine tablets with liquid this season — planning to shock my 10,000 gallon pool Saturday, what supplies do I need ready? Have liquid chlorine on hand but not sure if it's effective for shocking or if I need granular shock instead.

How much liquid chlorine would I need to properly shock? Want to raise chlorine levels by about 10ppm.…more

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Salt Water Medium 30 minutes 298 👍 0

Do Salt Water Pools Need Chemicals? Complete Guide

Our saltwater pool area reeks of that sharp chlorine smell every morning, which seems impossible since we were told these systems are basically chemical-free.

But now I'm reading conflicting information online. The pool store told me I'd still need to buy some chemicals, but I'm confused about what exactly. I thought the salt system was supposed to handle everything? What chemicals do salt water pools actually need, and why? I want to make sure I'm taking proper care of the pool and keeping the water safe for my family.…more

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Cloudy Water Medium 140 👍 2

Why is my pool cloudy after shocking?

I shocked my pool last night to clear up the green algae, but I woke up this morning to a milky, cloudy mess instead of crystal clear water. I didn't think the shock would make it look worse, but now I'm worried I messed up the chemistry. What caused this cloudiness, and what steps do I need to take to get the water looking right again today?…more

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Salt Water Medium 8-24 hours 796 👍 23

Should I Turn Off Salt Cell When Shocking Pool? Complete Guide

Staring at my salt cell wondering if I need to turn it off before shocking my pool — can't afford a $200 service call right now.

Should the salt chlorine generator be turned off while administering shock treatment, or can it continue running?

I want to ensure I'm following correct procedures to avoid any potential equipment damage or interference with the shock's effectiveness. What's the standard protocol for salt cell operation during chemical shock applications?…more

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Water Chemistry Easy 2-48 hours depending on chemical type 739 👍 0

How Long Pool Chemicals Take to Settle - Complete Guide

Halfway through adding my pool chemicals, they're just floating on the surface for hours instead of dissolving like they normally do. After adding chemicals like chlorine, pH adjusters, or alkalinity increasers, I want to ensure they're properly mixed before taking water samples for testing.

My pump runs approximately 6-8 hours daily, and I'm concerned about getting inaccurate readings if I test too early. What's the standard circulation time required for different types of pool chemicals to fully distribute throughout the water? I want to establish a proper testing protocol to avoid chemical imbalances.…more

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Maintenance Medium 45 minutes 195 👍 0

Pool Chemistry Points System - Water Balance Made Simple

Somewhere between my pool guy insisting I need a full testing kit and six different chemicals, I'm wondering if there's actually a simpler way to balance my water. My neighbor mentioned something about key "points" in pool chemistry that are most important to focus on, but I didn't catch all the details.

What are the main chemistry points I should be tracking to keep my water balanced? I'd love to know the target ranges so I can stop guessing and actually maintain clear, safe water. Right now I'm just winging it and probably making things more complicated than they need to be!…more

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Salt Water Medium 45 minutes 236 👍 0

Do Salt Water Pools Stay Clean? Complete Maintenance Guide

Already three weeks into this rental with a salt water pool I've never maintained before and getting nasty algae blooms plus cloudy water. My generator is running fine and producing chlorine, but somehow I still have to test chemicals, brush walls, and fight green water.

What am I missing here? Does the salt water system actually keep the pool clean on its own, or is there still a bunch of regular maintenance I need to be doing? I feel like I got sold a bill of goods about how "easy" salt water pools are supposed to be.…more

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Maintenance Easy 5 minutes 303 👍 0

Pool Glossary: SLAM, Sanitizer, PSI, CYA & Common Pool Terms

I keep seeing pool terms and abbreviations like SLAM, CYA, FC, PSI, sanitizer, backwash, and shock. What do they mean in plain English?…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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