jcowart
0
If and that's a big if the cya is 13. Most good test only go down to 20 + or- . Goto the full web page and click on pool math. At the bottom of the colored boxes, change the settings to match your pool. With the frog it will be traditional pool, chlorine source trichlor, surface vinyl. Then at the top fill out size. The now is your current test and target is where you want to go. Put in 13 for cya now and 30 for target. That will show how much to add. Cya is one chemical that is only in pools. They tried to sell you instant conditioner that's liquid. It's more than the granular but the same. The cheapest place would be Wal-Mart. It will have a purple lid and it's in the pool supplies. Find out how much you need and put it in an old sock or knee high and hang it in front of the return jet. It will take a few days to dissolve. Give it a squeeze every once and awhile. It will not eat your skin off if you get it on you. The only way to get rid of cya is by water replacement and your frog will add to that. For every pound of trichlor you use it will add 7.5 ppm of chlorine and raise the cya 4.5 ppm.