i have a Gold Severum in a 2 foot tank at the moment which is about 1.5inch head to tail and what i would like to do when i get my 240Gal tank in a couple of months is put him in there with my current fish which are said in my Sig' , but as i know he will get eaten or just killed if i put him in the tank at the size he is now , how long for him to get a good size to put him in the big tank and qiuck will he grow ?