 Tempered Glass ???
When did All-Glass brand tanks start using tempered glass tank bottoms? I have a All-Glass 55 gal, the sticker on the bottom of the tank says DATE BUILT Nov. 1987. I would like to drill the bottom of this tank. I have another 55 gal. that was built in 2000 and has a DO NOT DRILL sticker on it. it warns Tempered glass. Thanks _________  90 gal AGA,main,, 40,gal, sump/refug,aqua ev 120 skimmer, mag-5 pumps x2,, hydor koralia 3 circulations pumps x2,, sunpod 300w MH,, current extreme T5 14,000+super actinic 460,, 110 lb. DSB, 100 lbs. LR | 
