I'm hoping to get more into the herp world but where I currently live I cannot have anything large. Therefore I recently got an old bow front aquarium out of storage. It holds 6.6 gallons roughly. I've used it for fish in the past, but the lid came broken (which wasn't an issue with the fish) & I was interested in using it for a group of fiddler crabs. My issue is that the tank has been discontinued, and I cannot seem to find any way to cover the top! The tank was discontinued about 2 weeks after I bought it. The lid was just a giant piece of plastic anyway, so I don't think that finding another version of it would help. It won't be secure enough & I won't be able to use the proper heating elements. I've decided here will probably be my best place to post. the only issue is the bow front. The terrarium/tank in general is 24 inches long, 9 inches tall, and the bow front at it's widest point is 7/34 inches, and at it's narrowest is 7/12 inches. I have now clue how I'd make a bow front lid like you would for a rectangle terrarium. And they don't sell it. I do have the plastic rim that goes around the top of the tank. With this on, the interior width at the top is reduced to an even 22 1/2 inches long by 6 inches wide. Is there anyway to make a lid that would be secure for a small group of fiddler crabs? I just want to make sure they won't escape their vivarium. In desperate need of your help.