Split Tank, your thoughts.

[maxQ]

This is what I have decided to do (please see picture), I split the tank just until by boys get bigger as Mike suggested (smaller tank until they mature) then once they grow up and become big boys I plan to open the whole enclosure up to just my Milk Frogs, now...will I later be able to introduce a 4th Milk frog to my other 3, this tank once open fully is big enough to accommodate 4 Milk frogs very easy (4Lx16Wx24H. My Enclosures are never complete, I try to improve them with something everyday, Your thoughts are welcome please.