Rather than tearing down the whole tank and giving up the hobby there is another option that you might want to consider. When I built my tank I didn't want to deal with eurobracing gettin in the way so a had my father-in-law weld an angle iron frame to wrap the entire top of the tank. Of course it needs to be coated in some way to prevent rust. I don't have a pic of my tank available right now but here is a pic of what I'm talking about
I would drain the tank down about 2/3 so that the frame fits nice and snug once its refilled. A properly built and fitted frame should prevent the crack from ever getting worse.
My frame has held up very well for over 2 years now. My only complaint is the guy that did my powder coating did a terrible job and the frame began to flake a rust after only six months. Whenever I eventually tear down the tank to move it, I'll sandblast and recoat the frame myself.
Good luck, try to consider all your options. It would be a real shame if you had to give up the hobby because of this setback.
Now if only I can talk the wife into it.
You know glasscages could biuld a 120x48x30 pretty cheap, but Farmer would hate you and stop hangging out with ya if you did that. Hopefully you can resolve this issue in a quick hassle free and painless way without getting out of the hobby.
