So I'm about to do a rebuild/restock on my 20 gallon. I have black sand and some amazon swords in it already but I'm considering adding new substrate and plants as well. In terms of stocking, I want to have small schooling fish, with maybe 1 or two centerpiece fish and some bottom feeders. I love gouramis, cories, and want to get into cherry barbs and harlequin rasaboras. Any suggestions? Also i dont know if this is a stretch but I'm also thinking about maybe GBR or bolivian rams OR paradise fish. Please help me with any stocking suggestions and or plant and substrate builds please!