What size tank and how wide is the brace? How thick is the glass?
The main purpose of the bracing, from what I understand, is to help with any bowing in the glass that would cause additional stress and form cracks or failure. It doesn't take much to hold it together, and silicone is strong once cured.
I would still want to test it myself to make sure it was safe, but that is me. The only time I didn't test that way was on the tank that I saw full for 6 months at the store, and then I was the one that came in and emptied it before moving to my house.