New to posting on the board and I'd appreciate any advise. We've got a 20,000 in ground pool with a sand filter and ozonator and pebblesheen finish. Over the last several weeks we've had green / black algae on the swim benches and sun shelf and one or two spot on the shallow end of the pool.
Current readings with our test kit are:
Free Chlorine 2.0
I backwashed this morning and have been backwashing every couple of days. Last Thursday the Free Chlorine was down near 1.0 and I added some liquid shock. I've got chlorine tabs in the chlorinator. This morning I added a little bit of muratic acid to get the pH back down.
Back 2 weeks ago our sons' had their birthday party and I was in a panic I did a dose of shock, flock and algaecide that helped quite a bit, but didn't really eliminate the algae completely. Now a week later it's back again.
I've been brushing each day, but it doesn't seem to do anything much.
I welcome your suggestions.
Donna in TX