New here, but glad to read much in recent weeks. I have read many threads on stocking, so I have a basic plan, but thought I'd ask on finishing thoughts, particularly for my needs. I have a 20g long. I'm mostly interested in hearty and long-lived. In fact, I purposefully want to stay below stocking recommendations to make it lower maintenance. Let me say that again....I'm cool not putting more fish in my tank and prefer to stay below stocking recommendations.... Right now I have 7 Zebra Danios (6 reg and 1 longfinned. Love the longfinned, but Pet Supermarket where I'm at sells only the regs, but for $0.69 each, and Petco sells both for almost $3 each, so, regular zebras it is!). I also have a "black mystery snail". I see those only live for a year or so, so I won't replace it when it's gone. Or, maybe I could just add 4-5 and have that be a fluid part of stocking? My tank equipment: 20G Long; Marineland basic cover with LED light; I have 2 plants, one is an anubia on driftwood near center, and the other is cardinal plant (Lobelia Cardinalis) directly under the light; heater (tank at 76, but largely because that's the room temp); air stone; and 350 gph filter (marineland biowheel penguin 350), as I believe strongly in overfiltration, so whatever I add needs to be ok with a relatively flowing tank that comes from that. I'm thinking this: -add a few more zebra danios to get up to 10+ total (maybe up to 12) -1 dwarf gourami (like the "flame" version) When the snail dies, add a small crawfish? Or, are there other bottom oriented fish I should consider in lieu of adding the dwarf gourami? (i.e., a type of cory that's good in a set of 2-3 max)? In light of the significant filtering, other ideas? The zebra danios are totally ok with the fast flow of the tank. Just want to make sure whatever I add will be compatible too. Thanks!