cscannon
08-14-2012, 01:20 AM
I have a 30,000 gal in ground pool with a SWG. It is about 8 years old. My robotic cleaner is constantly getting gummed up with white stuff. It is about the consistancy of wet, white sand. If I leave the robot out to dry instead of rinsing it off right away, the wet "sand" dries into white flakes. Today the pool bottom had visible mounds of white flakes which I'd never seen before. The pH was about 7.8. I figure the stuff is calcium that precipitated because of the high pH.
temp 82
Ca 400
TA 90
cya 60
FC 2.5
CC 0
pH try to keep it about 7.3 to keep the saturation index close to zero but I am constantly having to add acid.
Here are my questions:
Would lowering the Ca help? If so, how do I do this?
I don't like that I am constantly (at least once a week) finding my pool with a high pH (>7.6) and then having to add acid. I thought buffers were supposed to help hold the pH more constant. Maybe without buffers I'd have to add acid every day. But the reason I ask this is that I saw one post regarding a similar problem with flakes in a SWG pool suggest adding borax as a "second buffer". But in reading the sticky posts in this forum I saw that borax only raises pH which is definately not what I need. And I thought that TA is a measure of buffering capacity and I'm already on the high end of normal for that. So what is it, do I add borax to make my pool more resistant to pH changes or not? Do I just keep adding acid and try to keep my saturation index close to 0? And do I just have to live with the fact that despite my best efforts I am constantly having Ca precipitate in my pool gumming up the robot?
Thanks,
Steve
temp 82
Ca 400
TA 90
cya 60
FC 2.5
CC 0
pH try to keep it about 7.3 to keep the saturation index close to zero but I am constantly having to add acid.
Here are my questions:
Would lowering the Ca help? If so, how do I do this?
I don't like that I am constantly (at least once a week) finding my pool with a high pH (>7.6) and then having to add acid. I thought buffers were supposed to help hold the pH more constant. Maybe without buffers I'd have to add acid every day. But the reason I ask this is that I saw one post regarding a similar problem with flakes in a SWG pool suggest adding borax as a "second buffer". But in reading the sticky posts in this forum I saw that borax only raises pH which is definately not what I need. And I thought that TA is a measure of buffering capacity and I'm already on the high end of normal for that. So what is it, do I add borax to make my pool more resistant to pH changes or not? Do I just keep adding acid and try to keep my saturation index close to 0? And do I just have to live with the fact that despite my best efforts I am constantly having Ca precipitate in my pool gumming up the robot?
Thanks,
Steve