I traded my 29 bio cube for my friends 90 gal
setup a couple weeks ago and I've started to hard plumb the return lines as he set it up with urethane tubing and no check valve. I noticed while looking around under the tank there is a sticker that says "this bottom is tempered glass for strength and reliability DO NOT DRILL". Well, it's drilled. Do these standard glass tanks come drilled
Or did someone drill it anyway? Is this safe? Everything seems fine with it and the bulkheads are sealed well.... Any input is appreciated!