CYA in a Filter Bag


Bronze Supporter
I couldn't find my sock or panty hose I've used for CYA in the past, so I measured the CYA into a vacuum filter bag and hung that in the pool. After about 2 hours I went to check on it and squeeze the bag.

To my surprise the CYA was fully saturated and I was able to squeeze it all out in about 5 minutes. It was cloudy white and dispersed quickly into the pool water. No lumps or granules in the bottom.

Did the CYA get dissolved well enough? Is this a new discovery? I tested my CYA and it's rock steady at 40 ppm. Should we incorporate this into our instructions?


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
There are many ways to dissolve the CYA. Most people have old socks. Few have filter bags. But sounds like it works well!


Gold Supporter
TFP Guide
Jun 16, 2019
I have 2 girls and a Mrs but I wasn’t going to hear it that I used the wrong pair of stockings when somebody changed their mind after the fact so I used long sleeve T-shirt arms again. I needed 15 lbs so it would have been a bunch of socks.
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Reactions: mhk.kohler


Gold Supporter
TFP Guide
Jun 8, 2019
Milwaukee, WI
Pool Size
Liquid Chlorine
Old laundry bag that used to be for my wife’s bras for me (zipper is busted but I tie it off anyway to hang it from a pole in the return). :)


Gold Supporter
Mar 21, 2016
Atlanta Ga
I have hair nets in my skimmers and added it that way. Just have to be careful and not add a lot at once but it held up well and kept the stabilizer from getting through
Should add I run my pump 24/7 and only pull in from the skimmers
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