Judging by your post you seem a bit lazy and unaware of the growth potential of these catfish. I've heard of them growing 1-2 inches per month. And they shouldn't be kept in a 5g even at their size. I'm look at my 5g i use to hatch fry and I couldn't imagine 2 rtc, an endli, and a bgk in there. I recommend you buy a 100g (or larger) tank or pond to grow them out in then eventually put them a large pond.

