picked up a tapajos orange/red from Rich about a month ago now at around 6-7", put him/her into a 180 gallon and it's nearing the 9-10" mark now, is this a normal growth rate, was it just a spurt - what can I expect on max size out of this fish, and is there any way to discern the sex yet - or if it's not a deep red at this size is it a male?