Hello all! So I posted awhile back around September about my juvie green terror, firemouth and electric blue Acara when i initially brought them home. Fast forward to today and they've all grown to about 3 inches and are still housed in a 40 breeder. I have a 75 gallon in storage to move them when ready. My question is what is the max size or how long should i keep them in the 40b before I absolutely have to move them into a bigger tank? They are definitely slow growers so im in no rush but on the flipside I also don't want to stunt their growth or stress them from being in a "tiny home." Also, knowing that my gt will get 10+ inches eventually, and he will be my centerpiece, his level of aggression may/may not change down the line.... I may or may not be able to keep his current tankmates with him. Knowing this, what are THE absolute suitable tankmate(s) I can keep with him if any at all?