If you have a hole(s) in your fiberglass bathtub, it’s most likely in your best interest to fix it before it gets worse. Sometimes you can get away without a permanent fix if the holes are confined to the vertical part of the tub, water doesn’t tend to affect the sides of the tub as much. But, if the holes are on the bottom of the tub and the tub is used everyday, any and all repairs you do will only be temporary. So even though you might have the repair done professionally, it may still look good but ultimately it will still leak over time. and most likely before you even realize there’s a problem again. A tub that’s used regularly is especially a danger as it will eventually develop a mold issue. Because you cannot see under your tub, it will get bigger and bigger and spread to other locations where eventually the mold will surface.
A great place to find a replacement tub without breaking the bank is Stardust Building Supplies http://www.stardustbuilding.org/ . This is where most of the valley goes to donate their household items when they remodel. You’ll literally find the kitchen sink here! Last time I stopped by they had rows of bathtubs to choose from for $50-$100. Definitely worth a look if you find yourself needing to make the full replacement. Tubs purchased through the traditional channels can cost you upwards of $300 so Stardust is a good resource to have at your fingertips.