While shopping on Craigslist this weekend I chatted with the seller of a bowfront tank, with the cross brace cracked free of the rim on top. I asked if he had it in use that way for very long. He said he used it for 3 years with the separated crack with no problems. The crack looks like about 1/8 inch wide, so I read that to mean the front and back glass bow out a total of about 1/8 inch with the tank full. That probably just reduces the safety factor for the tank glass, so it would take less of a jolt before the glass fails totally.
No, he had already sold it by then. I asked him, in an email, about the cross brace, which he mentioned in the listing being broken. I was considering the tank for a riparium, where it would only be about half full of water, so I wondered if his use of the tank would amount to a proof test of the strength. His recommendation was to assume he was just lucky and never to fill the tank full.Any chance he told you that just so you would buy the tank? Too ,uch risk for me