E eduller Fish Crazy Joined Jan 11, 2014 Messages 201 Reaction score 0 Points 0 Location US Feb 5, 2014 #16 This is just supposition, but there is a form of algae called mustard algae that I have heard of forming in swimming pools. It could be that but again just a guess.
This is just supposition, but there is a form of algae called mustard algae that I have heard of forming in swimming pools. It could be that but again just a guess.
