Hello; You cannot drill or cut tempered glass. It will shatter into hundreds of small pieces with a very loud bang. Tempered glass can not be altered. I tried it once.
Right but it says the BOTTOM is tempered. I dont see anything saying the entire tank is. I am wondering if anyone knows if they make these all tempered or just the bottom like the sticker suggests.
I recently drilled a 75g that has a tempered bottom. I put three holes in the end and lowered the front panel (turned it into a sump). The sticker said that the bottom was tempered so that gave me the green light to drill the end and cut the front panel.
Don't automatically assume that because it only says the bottom is tempered that the back isn't as well. I made that mistake with a beautiful 72g bowfront tank.