So I just completely redid my 20H and went for a bit of a stream look. It currently has 8 cherry barbs and 8 panda cories. I have an aqua clear 50 for filtration. I was going to use an 800gph power head from SunSun, for extra flow, but it made way to much current and my cherry barbs had trouble swimming. I think the stocking is pretty good, not sure what I could add. Keeping it at 74°F.