I have a silver arowana just over 8" in a nice tank. The problem is that where I keep my fish I am going to be doing some work so I need to move all my fish to a different place. Most of my fish I can put in a different place but for my arowana, two oscars and my pacu I need to put the somewhere else. I have this 12' diameter swimming pool that is not in use right now so why not there. My main question is if I put them in the pool will they get along? The oscars are both about 4.5" and the pacu is 6" and extremely shy. I have already put my arowana in the pool and he seems to be doing great. This setup is only temporary until the work on my 'fish room' is done. I would love to hear the advice of all of you experts on how you think this will work out.