It was nice to meet y'all.
On a side note:
I've sealed many aquariums with the silicone pictures above. A good friend of mine who purchased my 180 gal & has turned it into a large tang/bamboo shark tank has had complete success & happy fish.
I never told him that I used about 3-4 tubes on that tank alone when I was installing it's overflow boxes. I let that stuff cure for about 1 week.
On another side note: if there's anyone out there who needs silicone & doesn't mind driving TO me to pick it up - I can get you new tubes if it. Just hit me up. I don't ask for any $$. Now if you wanna bring a frag of something, it would make me smile - but it's free.