just wonder what the normal dovii growth rate is after 1st yr he got to 12 inches in that first year but has only grown 1 to 2 inches after 18 months hes in a 120 gal by him self
That's about right. After 12" they slow down and start putting on more girth. Also a larger tank would help and he is getting close to needing a larger tank anyway IMO. My male is a little over two yrs old and about 17". Keep up on water changes.