What is the absolute best clean-up critter?
I have a twenty gallon planted tank with seven female bettas. I'd like to add a few more girls, and something low-profile that will help with the plant detritus and algae. I clean the tank weekly, but towards the end of the week it starts to look rather unsightly.
So far I'm leaning toward the mystery snail. I'm not worried about the bio-load, but I do worry about it getting pestered to death.
Should I put up with it, or try to add a tank mate? My substrate is sand.