I have an algae problem in my 40g reef tank (a lot of green hairy algae growing on my live rock). I keep removing the algae by hand but it grows back imediately.
Also the glass gets completly green in max. 2-3 days after i clean it.
I have no slime algae (ciano or diatoms).
I have zero PO4
in my tank so this cannot be the problem.
I bought an algae blenny (salarias), but it won't eat the already grown algae and recently it seems to like the food I'm giving to the other fish more than the algae... so this didn't solv my problem either.
Could the lighting be the problem? I have a 4*24 T5 HO
fixture with one actinic and three 10k lights. I run them for 11 hours a day.
What else could I try to get rid of this problem.