I recently tore down my 55 gallon to move, but I was planning on storing it until I can use it again. However, I noticed one of the corners seems to be different than the others. The pictures will probably make it easier to see the issue than me trying to explain this. The crack has been there for over a year now with no apparent problems. However, I noticed the silicone seems to have bubbled up in places, and that's definitely a new development. Does this mean that seam is coming apart? I can't tell if this is something I should worry about or not. Figured asking experts is easier than finding 55 gallons on the floor later!