Suckermouth Catfish Help?

I want to get a suckermouth catfish (black algae eater) and I have one 20 gallon and a 10 gallon aquarium, the 10 gallon has tiger barbs and some danios and the 20 gallon is crayfish, wuld the suckerfish work in either of these two tanks? if not what type of sucker fish should I get?