I would have preferred that you started this thread before you added BG. For your question of compatibility of HSB & SMB they co-habitate well and usually feed in different habitats when not eating pellets. SMB if pellet trained will grow fast on pellets.
Several members plus myself have experienced SMB with BG. Not a good partnership because smallies have a hard time controlling BG. If you do it you will have to do a lot of manual thinning of the small BG (2"-4") or they will overpopulate and their growth will be slower than normal. HBG with their lower reproduction and recruitment work better with SMB and HSB than BG.
