Product to lower CYA

[sailork]

A few months ago Waterbear posted something about using the same chemical that is used to test for CYA to cause the CYA to percipitate in the pool. Basically you add it, the pool turns milky and then you filter out the milkiness which includes the CYA.

I can't find the old posting, but I seem to remember that the stuff was so expensive that it probably wasn't worth it.

[aylad]

The chemical is melamine, which is the same chem used in the CYA test that clouds the water so the dot is obscured. Basically it's supposed to cause the CYA to precipitate out so that it can be vacuumed up, but I can't imagine putting that stuff in your pool on purpose. Much easier to drain/refill, and probably cheaper too.

Then again, you can also do the swamp thing....let your pool go green for a few weeks and it will degrade the CYA..........but I really don't recommend that one, either!

Janet

[waste]

Illin, welcome to the forum, you've picked the right place to find no BS answers to pool care (not to say that BS never shows up here, but it gets cleared out quite quickly). Unless you have your pool over a stream, you should be able to drain 2 1/2 - 3' at a time without fear. If you use the sheet method advocated here (get a really big plastic sheet - enough to cover the pool with a ~5' overlap all around- and put a pump in under it to remove the 'unwanted water' and turn on the garden hose on top of the plastic. The plastic keeps the fresh water from diluting the water you are pumping out, and refills the pool at the same time * Don't use this method if you have 'fill water problems' (metals or whacky chems in the tap water.
Good luck with the cya lowering, hope this helps. If you need more help, all you have to do is ask! -Waste