I'm thinking a Marineland Bio-Wheel Penguin 100, but I'm still pretty new to this whole thing, and this is the first tank i'm setting up from scratch (the rest were all kits). My tank is a 20 gallon high that will be stocked with guppies (4) and neon tetras (6) and possibly ember tetras + pygmy corys. Oh and snails. Do any of you have experience with this filter? I'm open to suggestions.