everything is good, but the porky puff will bight the sharks fin, count him out. Also, if you get a brownbanded bamboo shark, make sure its a male. Males are smaller then females, so they don't need as big of a tank. Males-150 gallons, females-180 gallons. To find out if its a male it will have claspers under it's body. Claspers look like two small long little fins under it's body. Good Luck!