I only use glass tanks that open on top, so others will have to chime in for you on this- but also, are you sure you want a glass tank/"aquarium" at all? Many here seem much happier with the front-opening enclosures made of plastic (especially for keeping a BP), since the minimal air-flow will better retain the needed humidity too. There's multiple options (sources)- many ppl have their own favorites for various reasons that I'm sure they'll explain. Animal Plastics seems to be one of the favorites around here, but there's others.
The biggest drawback for these options though is the backlog of orders- most have extensive wait times so once you decide, & if you go that way, you'll want to place an order "yesterday".(I'm not keeping BPs now, so my preference for glass relates to the snakes I do keep- primarily rat snakes, with some other kinds too. Anyway, all my snakes do best with plenty of air-flow.)
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