I'm glad others are jumping in here. You CAN make a glass tank work, but it takes some work to do it.

Right now I don't have the time to go into all of it but if you do a search there is info here.

If your boa is a baby, that tank is too large period. You will have to find a smaller enclosure. Ideally all sides but the front should be covered or "blacked out" so the animal doesn't feel like,,, well,,, like it's in a fish bowl.

I have been successful with a royal and a 40 gallon tank, and have used lamps for heat, but I'd never consider it without a quality stat.

If you use lights for ambient temps, still use and regulate the UTH with a thermostat as well.

You should be able to get this dialed in pretty quick if you are doing things OK with the royals.