Adding CYA

noturbizniss · May 23, 2019

Moved from here.

mknauss said:
A cotton sock can slow the process. The best is a knee high nylon stocking or other very thin sock.

No need to test for the CYA until 24 hours after the CYA is fully dissolved from the sock.

If you do not plan to backwash in the next week, you can dump out the sock contents in the skimmer with pump running. I suspect it will be mush and will not even be caught by your filter.

I need to add about 10 lbs of CYA (im at 0). Would i just pour it all in skimmer slowly and then let it run straight for a few days? Or can i let pump go off at night?

mknauss · May 23, 2019

Do yours in steps. Normally about 2 lbs is the max you can get in a sock/nylon. If you turn your pump off, remove the sock and put in a bucket. You do not want to leave it in the skimmer without water flow.

Solid/granular cyanuric acid (CYA) should be placed in a sock and the sock put in the skimmer basket or suspended in front of a pool return. After adding CYA you should leave the pump running for 24 hours and not backwash/clean the filter for a week. Squeezing the sock periodically will help it to dissolve faster. Test and dose chemicals in your pool assuming the amount of CYA added is in the pool according to Poolmath. CYA can be tested the day after it is fully dissolved from the sock.

noturbizniss · May 23, 2019

mknauss said:
Do yours in steps. Normally about 2 lbs is the max you can get in a sock/nylon. If you turn your pump off, remove the sock and put in a bucket. You do not want to leave it in the skimmer without water flow.

Solid/granular cyanuric acid (CYA) should be placed in a sock and the sock put in the skimmer basket or suspended in front of a pool return. After adding CYA you should leave the pump running for 24 hours and not backwash/clean the filter for a week. Squeezing the sock periodically will help it to dissolve faster. Test and dose chemicals in your pool assuming the amount of CYA added is in the pool according to Poolmath. CYA can be tested the day after it is fully dissolved from the sock.

Thanks.... I was actually wondering about pouring directly in skimmer without a skimmer sock. No big deal to go out and buy one thoigh

noturbizniss · May 23, 2019

Also, I have 2 skimmers. If I go with a sock is it OK to add to both at same time or better to only add to one?

noturbizniss · May 23, 2019

Is a skimmer sock or nylon sock preferred?

mknauss · May 23, 2019

Cheaper is dollar store knee high.

Both skimmers are fine.

TFP does not recommend putting any raw chemical directly into the skimmer. It could plug your suction line or damage your pump. CYA can hang out in a filter for a very long time before it completely dissolves.

noturbizniss · May 23, 2019

Thanks much!