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I'm not sure why but this year I've been struggling to keep my water crystal clear/blue. Literally every morning I have a layer of what looks to be brown algae completely covering the pool floor. I have brushed, vacuumed, brushed again, vacuumed, backwashed, rinsed, and adequately shocked the...

I've noticed the psi in our Hayward sand filter jumps from 12 to 17 when run for 8 hours. In years past I've never noticed this kind of increase in pressure. Prior to running the filter for 8 hours, I did vacuum the pool which had a little dirt spread throughout the bottom. My water is clear and...

18-20k gallon gunite pool with fiberglass walls. Brand new k2006 test kit numbers - FC - 1.6 CC - .2 pH - 7.6 Alk - 80 CH - 60 CYA - 0 The water is clear but is slight yellow-brownish (see pics). I know I have to raise my CH to between 250-300 and I'd like my CYA in the 40-50 range. I did...

I have a gunite pool with fiberglass walls. My current CH level is about 170. Should I aim to up that to 250 with this kind of pool or just stand pat?

PH - 7.2 CL - 5 ALK - 70-80 BR - 10 CH - 160-170 FC - 5ppm CC - .5ppm TC - 5.5pm Water still seems a tad on the green side & cloudy but the bottom is easily visible. I just added 4 lbs of HTH Stabilizer & Conditioner Sunday afternoon but haven't tested the CYA level yet because I read it could...