Balancing the pool chemistry was a success. Values are WNL. Water crystal clear. I opened the filter system to clean and found the filters to be GREEN

Brenda Kahn

New member
Aug 12, 2024
2
Grand Island NY
Pool Size
40000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Autopilot Total Control PPC1
Back story - For many years we've had the same pool company open, close and clean our pool throughout the season.

Our Autopilot total control had a reading of pH 10.2. The dip strip read pH of 6. Our acid pump kept injecting acid in the line to correct the 10.2.

As it happens our total control needed a new board. The board was replaced and the Autopilot once again works perfectly and is a godsend.

Our pool guy advised us to take a water sample in to be analyzed. The chemistry results were way out of line.

The only thing I had on hand to add was sodium bicarbonate, 12 pounds, done.

The results
FC 2.07, pH 7, TA 55, CH 299, CYA 29, Copper 1.2, Phosphates 3076, Salt 3076

EVery 24 hours I added a professionally recommended chemical.

Over the course of weeks water samples were analyzed. Recommended chemicals were added.

Sodium bicarbonate, CYA, Muriatic acid, Chlor neutralizer, Metal out, Phosphate out.

I opened my StaRite filter system. I was taken aback when I saw my new filters were completely green. The pool water was crystal clear. The chemistry bid well balanced but my new filters are green.

For two hours I sprayed water between each filter pleat to remove the green.

What chemical additive led the filters to turn green? What is the green substance?
 

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The results
FC 2.07, pH 7, TA 55, CH 299, CYA 29, Copper 1.2, Phosphates 3076, Salt 3076

What chemical additive led the filters to turn green? What is the green substance?
Algae and copper.

Your pool water is not algae free even though it is clear.

Your copper level is high and you have been relying on some chemicals with copper in it to keep the water clear.

You need to decide if you continue with your “professional pool care” or switch to TFP methods doing your own testing using a proper test kit. We recommend the Taylor K-2006C or TFT Test Kits



 
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