Hi,
Our pool is 3 years old and we have not had a problem with it up to this year. The pH bounces up but I keep it in check with muriatic as needed. We're new to the forum and have a problem. I'm confused if it is algae or possibly scale.
FC = 5
CC = pool store says .1
pH = 7.2
TA = 90
CH = 330
CYA = 60
borates = ?
CSI = using calculator is -0.28
We have numerous small, typically smaller than a quarter yellow/brown spots on the walls. Some are in shade and some are in sun. Most do not scrub off. They seem to be in areas where the plaster is a bit rough. Chlorine tablets do not fully remove them and they reappear. I tried a small stainless brush and they do not fully disappear. I have not yet used an algaecide. I've been running the swg at 75% for 2 weeks for 8 hours with the filter. I just bumped it to 10 hours. I shocked the pool 2 days ago with granular chlorine 3#. That put my FC to 5 yesterday. It's still at 5 today. My daughter had a party last night with 8 friends. I was surprised the chlorine stayed up this morning. Now the pool is slightly cloudy. Any ideas or advice would be appreciated as the it seems apparent that I know more than the guy at the pool store but not enough to figure this out! Thanks in advance!
Our pool is 3 years old and we have not had a problem with it up to this year. The pH bounces up but I keep it in check with muriatic as needed. We're new to the forum and have a problem. I'm confused if it is algae or possibly scale.
FC = 5
CC = pool store says .1
pH = 7.2
TA = 90
CH = 330
CYA = 60
borates = ?
CSI = using calculator is -0.28
We have numerous small, typically smaller than a quarter yellow/brown spots on the walls. Some are in shade and some are in sun. Most do not scrub off. They seem to be in areas where the plaster is a bit rough. Chlorine tablets do not fully remove them and they reappear. I tried a small stainless brush and they do not fully disappear. I have not yet used an algaecide. I've been running the swg at 75% for 2 weeks for 8 hours with the filter. I just bumped it to 10 hours. I shocked the pool 2 days ago with granular chlorine 3#. That put my FC to 5 yesterday. It's still at 5 today. My daughter had a party last night with 8 friends. I was surprised the chlorine stayed up this morning. Now the pool is slightly cloudy. Any ideas or advice would be appreciated as the it seems apparent that I know more than the guy at the pool store but not enough to figure this out! Thanks in advance!