I've had a pair of baby Oscars for about a month and a half now. They're both Longtailed Tiger Oscars. I believe they're paired up now. Arkady is the larger of the two, and he is obviously a Longtail, his tail is so long it makes my female look like she's a normal Oscar. Creed is the female and is slightly smaller and lighter in scale colour. Neither one of them have any colouration. Arkady is like a dark brown, almost black. While Creed is a lighter shade of brown. I can see a slight design of where they would be red, once their colours start to show. As babies, I've been feeding them medium size cichlid pellets, the colour enhancing type. But they've stayed the same dull colour. Once in a while, I'd buy them like 60+ goldfish in one day, and just dump them in, to have a feeding frenzy. I kept the tank clear from clutter, I took out all my decorations from my previous fish, but I threw in an artificial plant, and a castle for the feederfish to hide in, to enlongate their existance. But still, the Oscars will eat them all within 2 to 3 days. I noticed when they had a lack of cichlid pellets, that's when their colours would start to show, a lil bit. I know I'm a horrible, horrible person for this, but right now they're only in a 20 gallon tank with a heater, auqa clear filter, and a long bar-type oxygenizer thingy-ma-jiggy for air. Besides that, I only threw in that dechlor to take out the tap-water stuff, and I keep them at about 80-82 degrees. I'm planning on getting a corner 55 gallon pentagon shaped tank sometime this month. When my babies were only 4 inches, I had thrown in a Tinfoil Barb and a Clown Knifefish. They both turned into expensive feeder fish, considering they ate the Knife within the hour, and Creed finally caught up to, and ate the Barb the very next day. Not to mention, I started off with 3 Oscars, but Arkady killed his brother once they hit 5 inches. That's what led me to believe Arkady and Creed are paired up now, plus the fact that they're extremely agressive for Long-tails. Right now, my fishies are about 6 inches each. I'm asking anyone for suggestions, like the actual perfect size tank for 2 Long-tail Oscars, and what else should I do to the tank I have now, and my future one, in order to ensure their health and Longevity?