For a 10 gal snails and shrimp are your best bet. You could easily do 20 or so red cherry shrimp and a couple nerite snails. Most efficient algae eating fish do best in 20 gals and up. Some do oto cat's in 10's but I don't recommend them since they should be stocked in groups of no less than 3 with no more than 1 per 5 gals which obviously can't be accomplished in a 10.