Well I called the rep and he told me that the tempered panels will be marked with a tempered sticker. The bottom is clearly marked. The sides did not have any stickers on them. I called Ken at the Critter and he called their rep for me and he said all sides are tempered

. So I then was on a thread on here and im'ed a few people with the tanks and two people said they drilled the sides with no issues. One guy said his was clearly marked with tempered stickers on all sides. So long story short, its risky

. I decieded not to drill and just arranged my lay out different. You can have chris or ken call them for you to see if the 29 is tempered. I didn't save the reps # i talked to and it was last month, so my phone deleted it. I think his name was gary.
Yep, it was black silicone. I like it.
And no, they are not the same guys, they are Deep Sea Aquatics.