My 90g tank is empty. I am considering a few different stocking options. 1. Shubunkin goldfish tank 2. Monster fish (around 12-16") aka "wet pet" 3. Tin Foil Barb tank I have 2 other larger tanks that are both 75g's. One will house an oscar and the other will be for my Macaw cichlids (Hypsophrys Nicaraguensis) What should I do with the 90g? I would love to hear everyone's opinions.