Hi all, I’ve been dealing with these puffball looking shapes despite having decent water chemistry. I can’t net them out as they dissipate into dust when disturbed. I’m seeing them in this same spot in the pool daily. I brush them away and they’re back within 8 hours. My brain says algae but the SWG has been maintaining FC between 5 and 7 as far as I can tell. Plus they grow back overnight!


I started the season with a swamp due to some leaks that precluded my running the pump. In addition I’m between robot vacuums at the moment so have just been brushing. Water is pretty good looking and clear besides these.
At present:
FC 15.5
CC 0.5
TA 130
CH 75
CYA 50
Salt tests at 2500 but Hayward Aqua-Rite is happy (onboard reads at 2800)
I’ve been adding ~5 gallons of 12.5% LC a day to see if the puffballs dissipate. I’ve just backwashed sand filter as well.


I started the season with a swamp due to some leaks that precluded my running the pump. In addition I’m between robot vacuums at the moment so have just been brushing. Water is pretty good looking and clear besides these.
At present:
FC 15.5
CC 0.5
TA 130
CH 75
CYA 50
Salt tests at 2500 but Hayward Aqua-Rite is happy (onboard reads at 2800)
I’ve been adding ~5 gallons of 12.5% LC a day to see if the puffballs dissipate. I’ve just backwashed sand filter as well.