brown algea problem help!

perculaman

New Member
I have a 55 gal tank with a wet/dry filter system and protein skimmer. I have 2 percula clowns, juv. emp., and yellow tang.
I do partial water changes every 2 wks. and I have a phosphate remover. The only problem I can think of is that my tank gets direct sunlight from the window. So I only keep the tank lights on for 3 to 5 hours a day. My water conditions are perfect so why am i getting brown algea shouldnt i be getting green algea at least.
Thanks for any help.
 
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