then they should pay to have it replaced..
awesome tank, but I too would be very leary of a patch. and the patch does nothing to refinforce the compromised glass strength in that area. the crack could spread, possibly catastrophically in an instant, causing a massive break and huge flood..
you are putting almost 3000 pounds of water/substrate etc in that tank.
look at it this way:
what is better:
a) waiting until you have the funds to replace the panels
or
b) patching it, having the tank break, and having 270 gallons of water in your house (costing a fortune in repair/clean up /replacing stuff)
don't risk it.
do it properly (replace the affected panels) or don't do it.
it never pays to rush when you are dealing with massive tanks..