First of all, I can't say enough good things about this forum. I've gone from completely ignorant to successfully running a community pool 24/7 completely on the advice available here. You guys have the patience of saints when it comes to dealing with newbies.
Following your guidance, I have yet to shock this pool because running FC at target levels given in your FC/CYA table keep the water sparkling, particularly if I set a fixed min at FC~3.5 ppm.
But I'm getting what may be black spot algae in the damaged areas of the plaster (pool has a history of running CH ~30ppm, make-up water levels). My brushing may have helped, but hasn't been 100% successful. I'm afraid I may be headed toward a need for shocking.
I'd hate to take the pool offline for anything more than a day. And as far as I know what I may do is wait until closing for the season and then shocking. Or perhaps waiting until next spring to deal with this.
But I realize that I have NO idea how long it takes a pool to return to swimmable FC levels after a shock. So that makes planning impossible. How long does that take? I'm sure there are chemicals that will knock FC down, but so far I've been able to follow this forum's advice and focus only on a very small number of chemicals.
THANKS!!!!!
Following your guidance, I have yet to shock this pool because running FC at target levels given in your FC/CYA table keep the water sparkling, particularly if I set a fixed min at FC~3.5 ppm.
But I'm getting what may be black spot algae in the damaged areas of the plaster (pool has a history of running CH ~30ppm, make-up water levels). My brushing may have helped, but hasn't been 100% successful. I'm afraid I may be headed toward a need for shocking.
I'd hate to take the pool offline for anything more than a day. And as far as I know what I may do is wait until closing for the season and then shocking. Or perhaps waiting until next spring to deal with this.
But I realize that I have NO idea how long it takes a pool to return to swimmable FC levels after a shock. So that makes planning impossible. How long does that take? I'm sure there are chemicals that will knock FC down, but so far I've been able to follow this forum's advice and focus only on a very small number of chemicals.
THANKS!!!!!