Killing Black Algae

clw72

Well-known member
Oct 24, 2013
70
Fort Worth, TX
Hello, I have a question about running the pool pump while killing black algae. FC is 14, CYA is 30 and we are brushing several times a day. Do we continue to run the pump 24/7 while doing this, or is it okay to just run it like normal for this time of year?
We had mustard algae when we started the SLAM process 4 days ago, but it appears that has all been killed. Not having much chlorine loss overnight, if any. We just still have several areas of black algae.
 

Katodude

Silver Supporter
Aug 22, 2017
1,274
West Palm Beach/Florida
Pool Size
15000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
Not sure on the pump run time, Marty can better answer that.

One trick that I used when I got some black algae this summer was to try to pour some LC directly on the spots (after scrubbing them). The more aggressive you get with Black algae the better.
 
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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
36,408
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Run the pump as normal.
 
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