Standard size 300s seem to all be 96" long, but any company that makes tanks can make you a custom tank of that size. You will just have to pay more to have it made to your dimensions.
I've never seen a 300 gallon rimless. You're talking about some serious weight there. I don't think its an off the shelf thing, its going to be custom, and very, very, very pricey
I've never seen a 300 gallon rimless. You're talking about some serious weight there. I don't think its an off the shelf thing, its going to be custom, and very, very, very pricey