Just need a few basic questions answered. Im looking into either a Silver or Black aro.... Want to know how rapidly they grow? Im using a 55g to grow out my cuvier/senegal bichir and was also wanting to grow out my Aro for my 300g. I have an AC110 and fluval305 for filtration. Trying to find out how long I have to buy the fish, house in my 55 and biuld my 300.....