So I got some work done on the tank itself finally... I picked up razor-blade holder and a small packet of blades (they were basically out of them

), some GE I silicone (without bio-seal, I looked for RTV 108 and couldn't find it), and some acetone.
Its been too rainy on the weekends to get a leak-location test, so I moved right to resealing...
I originally decided to attempt to remove and reseal the leaking glass pane, since it had already been "fixed" and seemed a good balance between putting silicone over a twice failed joint and tearing down the whole tank... But I found this.
The end panes are inside the front and rear glass panes. I'm concerned that I can't get a good re-seal by "stuffing" the end pane back in and squeezing silicone in around it...
I'm thinking I need to tear down the whole tank at this point... Comments??
So I started by removing the leaky pane anyway and scraping the silicone off. I've already burned through 2 of my 5 razor blades, so I know I'm going to need to make a run for a real box of blades.
While cutting the seal, I found that one corner was so tight I couldn't get the blade in. I foolishly tried to force it but it chipped the corner a little (approx .5" long by .125" wide). I then used some pressure to separate the seal a little and was able to get it cut. I don't expect the chip to be an issue, but anyone think otherwise?