Septaria porcellana (Abalone Snail)
Commonly know as the abalone snail, the Septaria porcellana is one of the best cleaner you could ever ask for. A small team of them will keep your glass wall sparklingly clean. They also do their munchies on rocks, wood surfaces and even leaves. The only drawback is that they will live eggs on the surface as well. But fear not, they only hatches if you are keeping them in brackish condition.