If I was going to cover it to try to make it less evaporation prone I would probably go with pvc jacket (I can get it for free) and then paint with truck bed liner paint.
Not glass related, but where will all your wires/hoses go for the tank equipment in this type of a setup? Obviously as a room divider you don't want them taking away from the fish view.
No need to cut since the width is perfect and the shorter then normal length made possible by my custom dual center glass cover guides, made of PVC angle if you read this thread. Certainly not to long since stock glass covers for these jumbo tanks usually run all the way to the center (2x long) on 1 central guide which overlapping the entire center brace which is a big waste. Since my covers are half that length only 30" they only require the thickness of glass covers usually used on smaller tanks ranging from 10G to 60G up to 36" in length. Salvaging cutting the panels from a $20 twenty gallon long tank not only saved money and fit perfectly with custom guides but also make for much lighter covers then normally used on a tank this size since they normally would be unnecessarily much longer and therefore much thicker. So quite the contrary, I have myself the best of all worlds, strong, light and affordable new glass covers. But your right once again I have come up with something different and outside the marketing and cost rules. I think Shaw summed it up quite nicely "Some men see things as they are and say why - I dream things that never were and say why not.""SUPPOSED to say... " :Angel:
got a table to cut that glass, gunner? looks like a tough cut (long and thin). curious to see how you go about that one.