This is my work in progress I have pearl long fin danios and my fry (not staying) in there right now not sure what else I can to for it as blue fish are hard to come by for a 21.5 gal tank. The plants will be moved to the sides. Only reason for UG filter was to look like speakers. It's so hard to find hockey decor for tanks. Every other sport but not hockey grrrr so want a zamboni I'm a newbie started in march.this is a Father's Day gift to hubby.