I've never dealt with that company, but it seems odd to me that they won't do a reseal unless it's that they are concerned about the height of the tank relative to the thickness of the glass. I presume "reseal" would be taking all 5 panes of glass apart and putting them back together and not just a "hobbyist style" reseal of stripping the inside edges of the tank and re-running a bead around the edges.