Is this black algae?

[elc]

Another AGP with what appears to be algae(dust) at bottom of pool:
Intex 12x24x52
Saltwater and sand filter system. System runs about 8hrs per day to maintain levels.
CYA:70
PH:7.6
FC: 7

Clouds away when disturbed. I can vacuum it up, but it will eventually return. SLAMmed a couple of times, but may not have held it high enough/long enough. Dumping 60 drops per test to achieve 30ppm, I went through lots or reagent in a short amount of time and ran out (had to reorder).

 

[mknauss]

It is not black algae.

It is algae - dead algae. But it was alive before it died.

Follow the SLAM Process

 

[elc]

Thank you. SLAM commencing again.

How does this play out actually? There's enough chlorine to to kill the algae, but not enough to prevent it 100%?

I imagine the dead algae will need to be vacuumed up? Or will activity in the pool combine it with the water and help the filter take care of it?

 

[mknauss]

Read the SLAM Process

The pool should be brushed/vacuumed every day during the SLAM. That removes the dead algae.

Algae is very resilient. You need to disrupt it to kill it. The brushing does that.

Follow through until you pass the three criteria for a successful SLAM.