Yeah they do. I had pretty major brown algae on the top surfaces of 300 pounds of rock work. I bought a 4" BN pleco. 24 hours later there were tracks all through the algae where the pleco had cleaned it. 24 more hours later, the rocks were CLEAN, and they have stayed clean ever since.under_control said:Bristlenose(bushy nose) plecos do eat brown algae though.
i agree..its great to see plantlife co exisiting with the fish...rashadrr said:I've just started to grow brown algae after my tank has been up for 4 months. I've had it for 4 yrs but I just moved and put it back up. I've heard the brown algae will turn to green which is what I want/ IMO you should let the algae be as long as its only on the rocks. When it comes on the glass then you should clean it off. I think the algae makes it a more natural looking habitat.