I think you misunderstood my question. The frog is in a 40 gallon tank with one silver dollar and a pleco. When I go the silver dollar I didn't realize that they should be in groups. So I got two more silver dollars that are just to small to put into the tank with the frog. I don't want him to eat them. So they are in the 10 gallon tank until they get big enough to put into the 40 gallon tank. I am looking into getting a bigger tank but this will have to do for now. So I have been thinking that I just might put the frog in the 10 gallon tank which is to small for him and put the fish in the big tank. I thought if they are in the big tank they might grow faster. The frog is and ACF and is about 2 1/2 inches from nose to vent. I don't think they are fast enough to escape the frog, I have seen him in action and is really quick to grab something. What would you do?