How can I get rid of the dead algae?

[newpoo]

Previously, my pool had quite some yellow algae. The water was very cloudy.
I shocked it twice, and have been maintaining chemicals at the correct level. (FC 2~3, CYA 20, PH 7.5).
Now the water is crystal. The algae are dead (no CC at all). However, there are still some black dead algae at the bottom and wall of the pool as in the attached picture.
I tried to remove it with brush, but it didn't work.
What can I do? Should I just wait for more time so that they disappear automatically?

Thanks!

 

[tim5055]

Have you passed an Overnight Chlorine Loss Test? Looking at the photo it appears not to be dead algae.

What you describe is not how we advocate eliminating algae, which we call a SLAM. Different from shocking a couple of times and you are sure everything is dead at the end..

 

[newpoo]

Yes, I did test it. The overnight chlorine lost was less than 1ppm.

If they are still alive, should I raise FC to 10 again (given the cya is 2), or just keep FC at 3 and they will die eventually?

 

[jblizzle]

If you see algae, then you have failed one of the 3 criteria to stop the ShockLevelAndMAINTAIN Process ... you pool is not "clear".

CC and having algae can be exclusive of each other.

 

[kimkats]

Not done yet Keep up the SLAM until it is GONE!

Have you tried putting puck on the spots?

Kim

 

[Patrick_B]

Based on this picture, you still have live Aglae sorry...

SLAM time is needed for this one.