High CYA - time to wait before retesting after 50% drain


Gold Supporter
TFP Guide
Jul 21, 2013
Northern NJ
Run the pump for at least 24 hours after all stabilizer has dissolved. Retest in about 48 hours. CYA takes a while to get distributed in the water.


Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
Bedford, TX

Good point! I would wait a day or so.. When you add dry CYA it normally takes a while to get fully dissolved into the pool water.. I would not think that would be the case when adding water to already dissolved CYA, but do not know that for sure.. As Allen says, it can't hurt to wait a day or so.


Jim R.