I have a 65 gallon tank with 3 Oscars. One Tiger and two Albino tiger. We originally started with 2 and 2 but lost one Tiger right off the bat. Not sure why, just happened. Everyone else seems healthy and happy and have been for 4 months. All three remaining eat very well and I feed a variety of foods that they all love. My two albinos are not growing. My Tiger has doubled them at least in size. Is this normal? Do the Albinos have a slower growth rate? Any suggestions?

Your tank is on the small side for three Oscars. Sometimes an Oscars growth rate differs from another one, they don't always grow at the same rate. Sometimes Oscars don't get very big whilst others do. As long as it's eating and looks healthy, you should be okay. However, you really should grades your tank to a much bigger one if you do want to keep them healthy long-term

i have a similar situation in my tank now. i purchased a red and an albino oscar in late january. at first they grew at the same rate the albino actually got a little bigger than the red at one point. now the red is almost twice the size of the albino.both are eating well so i think its just a growth spurt the red went through. hopefully the other will catch up soon but as long as they're eating and healthy i wouldnt worry about it.

also as ofl mentioned i would look into a larger tank to home your o's in maybe somethng in the range of 125 galllons.