HUKIT
Aquarium Advice Addict
No offense but the fish shop is trying to just sell you a bunch of very incompatible fish. Yellow bullheads are a native fish not really suited with tropicals, they reach sizes of 15". Bala sharks grow up to 14" and they are social schooling fish better off with 4-5 others, they will spook easy being alone and possible injuring itself. The common plec will reach sizes of 18"+ and is a huge waste of valuable bioload space. Dwarf gouramis are shy little timid fish and will easily be stressed to the point of illness. It's great you got a large tank but IMO your stocking it all wrong. My best advice from all your recent purchases from that shop is stop listening to them, they are simply selling you fish on their best interest not yours and certainly not the fish.