I had mold behind my toilet, and I thought that there was probably a leak in the wall behind the toilet. I called PlumbPros Plumbing to fix it for me. Their plumber told me that the leak was actually under the slab, and he did not even look into the wall. He recommended a specialist to me to find the leak under the slab. I called my contractor, and he told me to get a second opinion. I did, and come to find out, the leak was in the wall behind the toilet. PlumbPros Plumbing did not diagnose the problem correctly.