Admin note: this is a copy of the first 4 posts of this thread:
http://www.poolforum.com/pf2/showthread.php?15974
Hello everyone. I recently moved to a new house with a pool and I have been reading up this forum and started using BBB method.
The pool, in-ground 25k gallon, water is pretty clear now, but I still get algae on the wall even though I keep chlorine level at above 5ppm all the time.
I recently got the testing kid everyone is recommending and found that CYA is somewhere between 240-300. I had to dilute the water twice. and ph level is 7.5.
Is having CYA@240 the cause of my algae problem? How much water should I replace in order to bring it down to the acceptable level? say 50?
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