New to the forum - green water

[Lauraz22]

Hello,
Our pool wasn't kept up or used at all last year due to health problems.
We'd like to open it and I've been trying to get the chemicals balanced for a while now and was lucky to have found this forum. I ordered the test kit recommended and have been running the filter and backwashing daily along with brushing and putting some chlorine every day until the kit arrived. Here are my numbers:
Free Chlorine = 0
Total chlorine = .5 (I believe this is the correct term)
pH = 7.8
CYA = 55
Alkalinity = 230

I'm reading that I need to see how much chlorine to put in and buy double that amount.
Our pool is 22,000 gallons and from what I can tell on the Pool Math site I need 28 gallons of liquid bleach which means purchasing 56 gallons for the SLAM process. That seems like an awful lot. Is that correct?

Thanks for any help or advice you can give me!
Laura

 

[PoolStored]

Welcome to TFP!!! Congrats on the kit!

First, always round up the CYA to the next 10. Your CYA is 60.

To slam the pool, your target FC is 24.

4 Gallons of 12.5% liquid chlorine will raise your FC from 0 to 24, in a 22K pool.. If you double that, you should start with 8 gallons. It may take more in the end, but that should get you started.

SLAM is a process. You want to check your FC fairly often, every 2-3 hours or at worst, 3-4x per day, and raise your FC from where it is back to the target of 24. By maintaining an FC of 24 (for your CYA), you are keeping enough FC to kill algae. May take a while, but it will clear the pool. Keep this up until you meet all 3 SLAM exit criteria.

 

[Texas Splash]

Welcome to TFP! Also take a moment to update your signature with all of your pool and equipment details. The article below should help.

Create Your Signature - Further Reading

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