Hello! Absolute newbie here. I was given three live octopuses by my seafood supplier yesterday- supposedly so I can make sushi with. But after reading about them, I want to try and see if I could keep them alive as pets instead. I don't have a set up, and will probably only have time in the weekend to do so. What I have is a 10gallon tank, a pump, and access to salt water. Is that enough to keep them alive in the meantime? Or is this a lost cause?