I have one one tank that I can never seem to control hair algae in. It always grows on my 2 powerheads. I just do a 3-4 hour 50/50 bleach soak on them. I do this about every 5-6 months.I bleach my powerheads every 1-2 months. I find it makes removing the brown gunk that accumulates much easier. The powerheads come out brand new, except for the coralline, which turns completely white and flakes off in the tank after a few days.
Does anyone else use bleach to clean their powerheads?
PSA: Please neutralize the chlorine before adding the powerheads back into the tank.
I rinse and then do a short freshwater soak with a a dechlorinator solution.