This tub crack caused a failed plumbing inspection. This was a tub insert already in place when I purchased the house. It didn't hold water and was leaking. It was a very slow leak, so it wasn't initially noticed by the plumber. Quotes to fix were between $125 and $175 dollars. That quote wasn't the plumber, but another person that repairs and reglazes tubs. Sometimes you have to jump in to figure it out yourself. YouTube came to the rescue at a cost of $15 - FYI: That repair will change color and cure white in color.