green hair algae in overflow


New member
So I have a 65 gallon display tank with a 21 gallon frag tank attached. Not much of a problem in either tank however I always find clumps of green hair algae in my overflow. I've gotten into the habit of cleaning it out once a month however I am wondering if there something I am missing in my water parameters or tank maintenance which would preclude this from happening altogether. Phosphates are always under .05


Grizzled & Cynical
Every tank has the potential to grow algae, regardless of whether one thinks their nitrates/phosphates are zero or not. In your case, GHA is either being outcompeted in your display and frag tanks by things like coralline, or it is being eaten. Either way, a good thing. Think of the algae growing in your overflow as an 'accidental' scrubber, remove it as you see, and forge on!