i had my guys for like 2 weeks and they seem to have thickened up and growing already like almost 1/4 in i suppose. but they do grow fast just look up giant gourami on the site youll find out alot of info
i just moved my 2 inch osphronemus from a 20 gallon tank to the 125gallon tank, it hasn't grown in a long while, in one week it's grown at least a half inch or more, i can't wait to grow this baby up
They do grow very fats ive grown quite a few the red fins gorw the slowest. Ive got 2" permonth if not a little more out of them but certainly not 3-4" growth per month