I recently had the liner replaced in my 19,000 gal inground pool. The old one had lasted 10 yrs. For the last 9 yrs, I only used Clorox bleach for my chlorine. The contractor said that the liner would last longer if I added chemicals through the skimmer or a chlorinator instead of in the pool. Also, I'm thinking of adding a chlorinator which would hold 3 inch trichlor tablets so that I could be gone longer in the summer & still maintain the chlorine. I would still use mostly bleach. Am i getting good advice? Would appreciate your opinion.