Nassisarius snails don't eat algae, so you really don't have any algae eaters in your tank besides your 1 blue leg hermit.
Magarita snails are also a cooler water snail that eventually cook and die in your aquarium (I bought 10 that are dropping like flies now that my tank stays above 80 all day).
Trochus snails are very good as they can flip themselves over if they fall on their backs. Nerite snails are also good for a nano and stay very small. By far my favorite snails though at Stomatella snails. They stay small and clean very well. They also reproduce readily in tanks!
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32"x32"x20" Cube-ish tank
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