Red Tail Sharks Or Cory Catfish?

[tropicallover]

Hey!
So in the future I want some bottom feeders. Fish that will help with food at the bottom of the tank. fish that will eat shrimp pellets if I dropped them in.

I want a red tailed shark so bad! Do they get big? 20 gallon? How about Cory Catfish? I heard they need at least 3 though?

 

[Tizer]

red tailed shark will get too big yes, corys in a 20g, yes, you could get half a dozen or so, dont mix and match, get the same species. sand substrate ideal, not sharp gravel. done.