TOPIC: What to do with a cracked bathtub?

So it's fiberglass?  I can remember years ago when our family had the old pop-up campers, my dad always had to fix the corners of the fiberglass top which always cracked. It was (like David said) auto body repair, just fiberglass cloth, resin and a hardener. You would have to do it from the backside, but it might last a while.

Alternatively, you might just put one of those bathtub stickers over the crack which people use for traction. Those things stick incredibly well and it would mark the spot so people can avoid putting pressure there(and it may be enough to seal it). You can also stop the crack if you drill a small hole (maybe 1/8") at each of the ends, assuming you can find the ends. Of course you have to get over the fear of drilling holes in your tub, but since it's cracked anyway that might not be too hard.

Those are the "fix it over the weekend so it lasts another month and then you use it for another year" suggestions.  Good Luck man.

Dan, here are a few links on how to repair a fiberglass bathtub. I hope the links work. Good luck on repairing the tub. I have repaired several tubs over the years, not that hard to do.

http://www.ehow.com/how_6554671_repair-fiberglass-bathtub.html

http://video.search.yahoo.com/video/play?p=how%20to%20repair%20a%20fiberglass%20bathtub&tnr=21&vid=1177756304772&l=163&turl=http%3A%2F%2Fts1.mm.bing.net%2Fvideos%2Fthumbnail.aspx%3Fq%3D1177756304772%26id%3D88f95bae661dc448092f2debd41d8121%26bid%3D0c2iSOh15ael%252bA%26bn%3DThumb%26url%3Dhttp%253a%252f%252fwww.youtube.com%252fwatch%253fv%253dbOKLKuPd2fk&rurl=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DbOKLKuPd2fk&sigr=11anr7j91&newfp=1&tit=The+Bathtub+Medic+-+Bathtub+Crack+Repair

http://www.associatedcontent.com/article/244445/diy_home_improvement_tips_how_to_repair.html?cat=6

http://www.westsystem.com/ss/fiberglass-tub-and-shower-repair-2

Gary's got some amazing sites there that are really helpful with your plumbing problem. However, I do have to agree with Jeffrey and for you to really start looking at replacements soon; especially if you're still using the tub now while deciding what to do with it. You can try resin or putty just to have a temporary fix, but again, the weak point has already been created in the tub and you don't want to have to call in an emergency plumber. So it's a good idea to start hunting for some good sales on the bathroom facilities. 

Check out bathtub liners.

www.bciacrylic.com/

Since we're coming up on two and a half years since he had this problem, I'm betting it has been addressed.

Either that or he now needs advice on major water damage below a tub.

Dan, what did you end up doing with this tub?