Okay, I went looking around HD tonight when getting some GE I 100% Silicone for W/D adn Found this stuff...
This Stuff looks like it may be the Hidden Key to Deep Scratch coverup on aquariums.... It says that it's Dishwasher safe and I wil have to confirm via a phone call to the mfr tomorrow but if it's good with dishes and drnking glasses then why wouldn't it be fine for inside aqauriums?
Take a look...
I looked into the ingredient "Cyanoacrylate" and it's in the same glue that is used to glue Marine Frags together so it should be perfectly safe for an aquarium.....