The Tank that you have could be divided in half. Take the measurements and go and get a piece of glass cut for you, and get some Aquarium silicon. place the new glass in the middle of the tank and make sure that it reaches the top, and then run a bead of silicon on all three sides and let dry. Also, make sure that when you put the top back on your tank, that there isn't any space as hatchlings can climb through things that you may think are too small. I am sure that if you use the search function, you will find a lot of info on it.