Algae ??

[aswetich]

32K Gallon Liner Pool
Using Bleach
PS233 Indicates Everything is right on
CYA=60
FC= 6.0
CC= 0

I kept these setting constant for days so I am confused at what this stuff that keeps showing up on the bottom of the pool a couple of days after cleaning. Most recently I tried to vacume it out to wast and it still reappeared. Can algae grow with these readings ? I hope the attached picture shows it good enough.

Thanks