Hi, I'm about to start creating my first tank for an octopus. The tank size will be 720 liters (190 gallons) with the dimensions 2 meters x 0.6 meter x 0.6 meters. I don't know what kind of squid i will put in it (it depends on what I can get) - but it will be some kind of correl reef squid. Except from live rocks what can I use to decorate my tank (ie. correls, plants, mussels)? Are there any other animals I can put in the tank without having the squid eating them (ie. fishs, shrimps, sea stars)?