I wish I knew more about the subject to give you a definitive answer, but I think having separation between the glass would drive me nuts if I did not address it. What size tank is it?Yeah, I'm draining it as we speak. I can't take the chance of that happening. If i clean the corner and cut the existing silicone and reseal the seam will that fix the issue? Or will the Silicone between the two panels still keep separating?