You could keep a small pair of them in a 75/90 for quite a while. You may have to upgrade a 6 ft tank though someday.If I were you, without a doubt I would go with Freddie’s. Jags are an amazing fish but way overkept. It would be interesting to see a group of true bumble bee Freddie’s “Pantanos de Centla” from COTA grown out. I don’t know anyone on this site who have a thread on them yet and they would look awesome. Very rare fish.