I am planning on keeping my oscar in a 30 gallon untill I can upgrade to a 75 gallon. The oscar is with 2 blood parrots, he is about 2 inches right now and the parrots are about 3.5 to 4 inches, they get along pretty well. My question is how long can I keep him in the 30 untill I get the 75. I'll probally get the 75 in about 7-8 months. Is this too long? Also can I keep him in the 75 with the 2 parrots?