[Olympia]

One of my tanks had a root tab in it, and the black silicone in that location has turned orange.
I'm guessing that stuff in the root tab leeched into the silicone? Cause when I got the tank that wasn't there and that's the only thing I can think of that would cause it. Just wanna double check. :/

 

[Byron]

I think this is quite likely the reason. This might be iron. Not to worry about, anyway.