fungia,
i really wish i could do that, i tried, but my fish (dragon wrasse) likes to pull them out of the whole and throw them on the sand. so i kinda had to do the rubberband thing. so, yea if you don't have fish that likes the tank the way they want it, you can put the colts in the holes. thank you fungia, you reminded me about how to do it that way. :wink:
good luck,
wrasser 8)