What more can I do to to help my fish?

, Thats no answer at all, YOU can keep gold fish and plecs together , also housekeeper fish , pearl guramis neon tetras , a cat fish, and firemouths, my tank is a tropical tank and my pleco is huge ,Ihave also bred firemouths in there , all have grown in the tank together , also I don't do all this testing ect , my fish are all happy and healthy. Go to pet shop that sells lots of different fish or a breeder they are mines of information , i use the tonic salt as booster for them and give live food occasionaly,