I`ve found a piece of toughend glass 7x4 and I have used it as my tank base.The hight is 26" .I must still add the bracing and was looking for some imput from you guys .I have used 3/8 (10mm) glass.
Standard euro bracing ....strip on each side and one center brace seem to work very well. Odd diamentions but you might be able to order a top and bottom rim from glasscages.com.
I looked around and it seems that 3/8 glass is normally used on tanks 26" hieght.I would have used 1/2 glass if I had gone any deeper.I was worried that it maybe difficult to reach the middle of the tank if I went deeper thats why only 26" deep
just to keep updated on this conversation ...
personally; I would be more inclined to get thicker glass.
That much water for me would be some BIG fish that could knock something
over into the glass an break it!
I think next year I may be cutting out my fireplace for a custom tank w/ ventilation (humidity control).