Dead or Mustard Algae

[Kaspergbge]

I’m having issues getting rid of what’s in the bottom of my pool since I opened it up this year. I’ve read articles but I cannot figure out what it is. So I’m looking for help. Is this Dead Algae or Mustard Algae? How do I know?

Also how do I get rid of it. I’ve used a robot with a fine filter. I’ve added some DE to my Sand Filter. I did a SLAM for 25 hours. I can’t get rid of it and it’s annoying. Thanks.

FC - 8.0
CC - 0.0
PH - 7.4
CYA - 30
TA - 80
CH - 220

 

[mknauss]

Can you pass an Overnight Chlorine Loss Test?

 

[Kaspergbge]

I did not do one last night, but I can do one tonight

 

[Kaspergbge]

So I missed that step and I was not able to pass the OCLT so I started the SLAM process again. I do that till I have one or less loss of PPM which I now understand. Thanks.

I still am wondering though how I know if it is dead algae or mustard algae cause in here it talkes about taking chlorine level higher during slam for Mustard algae.

 

[Parac]

So I missed that step and I was not able to pass the OCLT so I started the SLAM process again. I do that till I have one or less loss of PPM which I now understand. Thanks.

I still am wondering though how I know if it is dead algae or mustard algae cause in here it talkes about taking chlorine level higher during slam for Mustard algae.

Have another read of the SLAM directions. You may pick up other things you missed previously.

There are 3 criteria to complete the SLAM.
OCLT 1 or less as you mentioned
AND, 0.5cc or less
AND, crystal clear water with no algae (dead or alive) How Clear is TFP Clear

For CYA of 30 that is FC of 12. Brush everything. Inside skimmers, drains, and ladders, and behind lights are common places for algae to hide and require extra work to remove and brush.