H3D said:IMO a 10 gallon aquarium is a little too small for kuhli loaches or cory cats.
IMO, your standards for a ten gallon are out of line. I have kept many fish, including corys, Kuhliis, Barbs, tetras, plecs, and various other fish in ten gallon tanks and have had no bio-load problem whatsoever. If you can't keep corys or kuhlii loaches in a ten, you can't keep anything in a ten.