I'm setting up a 5 gallon tank as a first time fish keeper and before I add any water I wanted to see if somebody here had some suggestions.
On several of the glass walls there are smears of some kind of sealer (I'm assuming silicone) that I would like to get off. It's not a huge amount, maybe a couple of spots the size of a quarter. I know you can get various chemicals to remove it, but I don't want to kill the fish with whatever residue it leaves behind. Also I thought about trying a razor blade, but since the smears are so thin I'm afraid the glass will scratch.
Any suggestions on how to remove this stuff without making the tank toxic?