Sludge and maybe black algae

[purptiger]

Well it has been and interesting winter down in FL. We had hi winds and below freezing nights. I turned the pump off during this period and now have black sludge in pool. I tried to manually vac it out of the pool; but would not come out. Here is my latest water test:

FC. .02
PH 8.2
TA 100
CH 320
CYA 0
Temp 72
Already have added 3 qt. MA to bring down PH. I am going to Leslie`s to see what they say. Do you guys have any input? Thanks purptiger

 

[JohnT]

Raise your chlorine, run your pump and don't listen to what Leslie's has to say. Scoop the sludge out with a pool leaf rake or net.

You should always run the pump if you have temps below freezing.

 

[frustratedpoolmom]

I'll add a few 2 cents....your CYA going to zero is a possible sign that you are going to have a very high chlorine demand - follow the process for shocking your pool (see link below)... raise your CYA to 30-50 until you complete the shock process with liquid chlorine - then once the FC is holding overnight you can resume using your SWG (and raise your CYA up to 60-80).

Shocking Your Pool
Water Balance for SWCGs