This past fall I was mowing and hit a sharp rock that hurdled through the air and sliced about a 4 inch cut in my intex pool. Had I not noticed right away, I would have thought someone took a razor blade to the pool bc that's exactly how it looks. I patched the gash on the outside, but water still trickles out of the patch. I did the small patch with a bigger patch over that and then another bigger patch over the area. Are the patches supposed to go on the inside? thanks Oh, and I bought marine vinyl from a fabric store. Is that the right thing to use. I used HH-66 vinyl cement.