Originally Posted by Karay
I've been thinking of doing this as well but have been leering of siliconing stuff to the walls of the tank. I did recently come across an idea of embedding mag float cleaners into the wall and using the other piece to hold it in to place
Karay, I did a lot of research before I decided to use silicone. After reading several blogs and watching a lot of youtube videos I went with GE 1 Silicone. It's 100% silicone and safe for aquarium use. That seemed to be what everyone was using. As long as it's 100% silicone with no lime (i believe), AND it's safe for aquariums, you're OK to use it.
Of course, once I get it mounted into the tank, I'll flush my tank several times to make sure I have it nice and clean. And then I'll check all my levels and cycle before I put fish in there. Never hurts to be overly careful.