I speak from experience! Right now, I have a scribbled Rabbitfish and a yellow tang in my 60 cube. They were really tiny when I got them now they’re much bigger and they will have to go. I’ve just ordered a fish trap so I can get them out. I’ll probably find another tiny tang and put him in for a bit. Then I’ll have to find a home. I will probably keep getting little ones cause I need the algae control.Honestly, if it were a foot longer I probably wouldn't ask But, I am most certainly in the same boat as you. I would have SUCH a hard time rehoming a fish I've had for a while (Have had my clowns for almost 3 years and when I was debating a clown harem, put money aside for a rather expensive custom nano just so I didn't have to rehome them, lol)