I have a 20G tank with 8 Zebra danios in it (for roughly two weeks). They have been doing fine so far, but there is some brown algae forming in my tank. I would like to get some kind of algae control but after research a snail seems like a better choice than a loach or other fish. I also have some Italian vallisneria and java moss in the tank. What kind of snail would you recommend?