I have turtles in a standard 55 gallon, and I have an empty 65 gallon cube. I would like to somehow join them together so that the 55 has only a little water in it and the 65 is a big, deep pool and the turtles can go back and forth. I would like to have water flowing from the 55 into the 65cube if possible. I don't mind drilling the 55, but I don't want to mess up the 65cube. I am not opposed to using cinder blocks to make height adjustments. I'm not sure if this is possible. Does anyone have any suggestions?

lol