rkymtnman
Well-Known Member
mold likes dark but algae likes light. could you put up a pic of this res that you are talking about and where it's at? that would help.Are you sure about this? Usually mold like dark, warm places... wouldn't light help prevent it? As long as I can keep it cool...?
but generally speaking, light-proof everything from reservoirs all the way to tubing for airstones, etc.