White dots that look like Black Algae but are white

09659

In The Industry
Feb 7, 2013
138
Pool Country
#1
I saw a pool today that had white dots that look like black algae but are white.

The plaster is black.

The patches of dots are in a couple of patches on the floor.

What caused these dots? Bad plaster mix?

Thanks
 

onBalance

TFP Expert
LifeTime Supporter
Jul 25, 2011
870
Utah
#8