Split by moderator from HERE. Please start a new thread for your own questions and discussion to avoid confusion. Thanks, jblizzle
My Cyanuric acid (CYA) reading is over 100, so I need to drain some water and refill. I've done a good bit of reading on line over the past few days trying to determine the best way to drain in order to have the biggest impact on lowering the CYA. Some sources said the CYA is heavier than pool water so draining from the bottom is best, whereas other source(s) said that CYA tends to concentrate near the upper part of the pool water so draining from the top 12"-18" is best. I'm probably going to need to drain about 50-60% of the water from my 12,000 gallon pool to get the CYA down to less than 50. I'd like to get the best CYA reduction reasonably possible if I'm going to dump 6,000-7,000 gallons of water (during a drought no less). So -- do I: a) drain from the top 12"-18" b) drain from the bottom; or c) doesn't matter at all which level I drain from?
From my on line research and reading it doesn't appear that there is a viable, cost-effective way of removing excess CYA from pool water. If someone could develope a cost-effective way to remove excess CYA and avoid draining and refilling that would be great and could be a very valuable service. My son is a chemistry major in college. I think I'll ask him to come up with a better solution to solve the excess CYA problem -- like some sort of filtering medium you can place in the skimmer basket(s) or the pot filter to capture excess CYA until you get to the optimal level.