ive been told i need a cover glass for an eel tank but dont know how to fashion a lid make it in to sections or could i just use some egg crate or electrical crate this would be weighd down with with the light how hard would it be to make it acrilyc or would that not be heavy enough if the eel jumps or with an ocy would have to be sealed or the crate would have to be small holes as the ocys for sale are not very big yet