I'm looking at my tank this afternoon and noticed this white in-between my glass panels. Or behind the silicone. I don't think I've ever noticed it before. Tank is alittle over a year old to me. But probably about 5 years old or so. I have been considering re siliconing this section because it was alittle thin. But I feel like this white is new. Do I need to drain this tank immediately?
As you can see it's only on the on side.

As you can see it's only on the on side.

