i dont think any tank could make enough algae so support a pleco non stop
high nitrates cause algea blooms, but im sure nobody wants to keep them high
since i switched from 15 watts of flouresent to 108 watts of T-5 lighting in my 55 gallon, the algae has been too much for 5 otos and a very shy clown pleco to keep up with!
i would suggest trying alternate foods, such as a small peice of cucumber on a veggie clip. pretty much any green vegetable would be enjoyed by them. try messing around with veggies and see what they like
if you havent seen this thread before, maybe this can help you out a little
It's true, plecos love their cucumbers... & it's not just plecos... or cucumbers