Relentless Pool Algae

If it's a chlorine pool you may have excessive Cyanuric Acid (CA). It's a stabilizer used in chlorine tabs that builds up and the only solution is to drain your pool. Not necessarily all the way but significantly.

While getting your CYA levels in line try scrubbing your pool and using an abundance of Ozone shock. Run your pumps nonstop to filter out the dead algea.

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salt water

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Prob not CYA unless you’re shocking with dichlor instead of cal hypo or bleach then. Best of luck.

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Prob not CYA unless you’re shocking with dichlor instead of cal hypo or bleach then. Best of luck.

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Sodium dichlor shock doesnt have stabilizer (CYA) in it. At least the one I use doesn’t. It should be effective as a pool shock treatment. Algae can be stubborn. Scrub your pool, well, and shock the piss out if it. I had some stubborn algae growth last summer and beat it by shocking every other day with diligent brushing for about a week depending on how big your pool is. Run your pump all day and night or close to it as well. If it gets bad enough you might have to flock it and vacuum out the dead junk that sinks.

Check that. Dichlor does have stabilizer in it. I use it bc calcium hypo was raising my water hardness levels a ton. CYA is not listed as an ingredient on the bag but apparently it’s in dichlor and trichlor (the pucks, which I knew it was in). I’ve never had a chlorine lock issue though but I might look into just using calcium hypo and a water softener. My pool is small so it’s easy to dilute the CYA out if needed, maybe that’s why I haven’t had any issues.

I’ve dealt with this before. You have to shock it heavily and you can’t do that if your CYA is too high. Two pool supply stores were clueless to help me.

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Thanks for the input. We transitioned from chlorine to salt water 4 years ago. We have never had a problem like this. I will scrub the sides again tomorrow morning for the third time.

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You need to get your water tested at a pool store to see where your water is out of balance. You can buy the chemicals much cheaper at hardware store or grocery store

Muriatic acid (HCl) will lower your pH
Bleach (a caustic) will raise your pH
Baking Soda will raise your alkalinity

High pH, greater than 7.8, can make pool look like you have an algae problem because it has a greenish tint. A SWG tends to raise pH over time.

There is a website, Trouble Free Pools, that will give more insight on water chemistry.

I used to get algae often since I started using Pool RX in the pump filter I haven’t any algae issues.

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You need to get your water tested at a pool store

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WORST ADVICE ever.

Get a very good pool water testing kit, follow Trouble Free Pools SLAM process to get rid of the algae spike and test weekly thereafter.

You'll be spending much less money and have crystal clear water in no time.

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Another vote for TroubleFreePool.com

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TFP is a great way to get started anlong with pool math app and LSI calculator. After a couple months to a year, you’ll get a good enough feel for your pool to eliminate a majority of the work they preach.
I’m to the point now I can add a small amount of chlorine every evening, then maybe add a little more if I can smell it an hour later. That and a cheap strip test every month or so for very minor ballpark adjustments and tabs while on vacation and no green.