How fast do Angelfish grow? I would love to put two in a 29 gallon Hex tank that I have set up and cycled... it has been cycled for several months and has only a couple snails and one lonely BN Pleco in it. It also has several plants. I really want to put two small angel fish in there but hesitate because I know they really need a bigger tank. I do have a 55 gallon I could move them to. It is not currently set up and my hubby would like me to wait until after our house sells... just because moving full tanks is harder than moving empty ones... So... my thoughts are that I would like to get a couple of Angelfish and put in the 30 gallon hex so we can enjoy them for a while... maybe 6 to 12 months. But if they grow really fast then that is probably not a great idea because then I will have to plan on moving them sooner rather than later and I don't want to be forced into setting up the 55 gallon before we move, and of course, we have no way of knowing for sure when that will be.