Sailfin tang in 90 gallon ?

Would a Sailfin be Ok in a 90 gallon tank with a blue tang ?

 

A sailfin and a blue atlantic or a regal tang will be fine together, however the sailfin will outgrow the 90g in sometime.

 

How long would you say before he/she is too big and what size is too big ?

 

Depends on the size of the Tang, Tangs are more easily manageable in my opinion to have around the 2-3" range to start with, but have some growth spurts but slow down in between. Just depends how small you get the fish. I wanna say depending on the fishes growth rate 1-3 years.

 

Fwiw, a regal tang will outgrow a 90g as well as the sailfin tang.

Regals will get to be close toa foot long, and the sailfins will grow to just over a foot long.

I had my 4.5" sailfin in my 90g, and it was noticeably bored in there. I transferred him and all the rest of the fish to the 200g, and it was immediately happier.