Im breeding some tropical sprintails at the moment, just in a small ziplock container, when i first had them there werent any on the sides of the container but now the sides are a little gritty from me moving the water around inside and its a little crowded in the container so now the springs are on the sides. I have some in a terrarium and none have moved onto the glass so i dont think they climb too much, unless they are over crowded and have stuff to hold onto