Yes, the prehistoric looking Pleco!
Do you have live plants in the tank? - this can be a concern with Plecos!
If you do have a bad algae problem, lets get to the bottom of the reasons why! Perhaps we can offer some tips to help prevent it from getting so bad so fast.
How long are you leaving your lights on?
Does sunlight hit the tank?
What is the tank size, whats in it, and what are you feeding, and how often?
Do you change part of the water regularly?
I realize you asked a simple question, but if other people find this thread, maybe these questions may help them too!
