Biofilm at water line of hot tub
Day 4 of slam. Do you think this is algae in biofilm or copper? Had pink slime 3 years in a row. Never fully treated it. Only see this when hot tub "running". during the day I run the pool 1/2 the day; the hot tub the other half; then just the hot tub all night.
FC 16.5 on waking up
cc in hot tub 1
cc pool .5
CYA 50
TA 130
CA 200
PH 7.8
Day 4 of slam. Do you think this is algae in biofilm or copper? Had pink slime 3 years in a row. Never fully treated it. Only see this when hot tub "running". during the day I run the pool 1/2 the day; the hot tub the other half; then just the hot tub all night.
FC 16.5 on waking up
cc in hot tub 1
cc pool .5
CYA 50
TA 130
CA 200
PH 7.8