Hello, this is my first post so thanks for any answers. I will be moving in about 3 weeks and have purchased a 300 gallon tank for the new house and the setup will be no problem. Now, I have 2 tanks setup now, in the 135 gallon 6x18x25 I have a 11 inch midas/red dev hybrid, 8-9 inch pike, a 4-5 green terror and a 11 inch Mystus leucophasis upside down catfish--these fish have been together for 2 years except for the terror. The devil is the king and there are no real problems here. Now I have a 75 gallon with an 9-10 inch oscar and a 5-6 jaguar with some tiger barbs and some ba tetras. These two fish were given to me or I would say I took as they were both in there own 20 gallon tanks and my neighbors had no idea they would get this large. The problem I see is when they all move to the 300 as I do not want to take care of 2 tanks anymore. Any sugestion on how or who I should move first, second etc. or do you think I might have to remove some of these fish. The oscar had hth when I got him but I seemed to have stopped it from getting worse thanks to clean water so I dont think I can bring this fish to a pet store as I doubt anyone would want this fish. Sorry for the long post but thanks for reading.