Hi.
I was told by my tank maker that for a 5ft x 2.5ft x 20inch tank, i will require a 15mm glass. However when i did a search on this forum, even the 6 footers are using 12mm and i also crossed checked with the aquatools website calculator, it says this size requires 8mm thickness. So am i right to say 15mm thickness is not necessary?
Thanks.