I would like to hear from Doc on this -
I had a huge cover for a twenty by forty foot swimming pool. It was most likely this same material - but thicker. I had a big reel to roll it off the pool, and it was quite heavy when it was on the roller. We tore it once by not handling it correctly, and the folks who sold it to us came over and put a patch on it with a bit of scrap material we had left over. They used a small propane torch to heat it to just melt the surface of both the cover and the patch, and then pressed the patch in place. It worked for whatever number of years we had it after that point. In fact they said that their method was based on the technique used in the factory to create seams, just on a smaller scale, and we noticed that all the doublers they had installed around the straps and such looked to have been installed in the same way.
I suggest this because if the ozone ever does eat through, you might be able to patch it if you saved some of the 'trimmins.' Or, you might want to add a bit over the spot the ozone hits it now, to prevent burn through. You could sure practice on some scrap material if you have any left over.
Thoughts? Ideas? Predictions on the weather?
8-)