My Hayward gas heater has to be replaced because the water jacket has corroded. This is my second gas heater in 7 years. The repair man said he thinks it is because of the salt water. I use my Taylor Test Kit to constantly check my water and maintain all of my levels. He recommended that after we replace the heater that I take a sample to the pool store on a regular basis to have documented proof that my water is balanced. We keep the pool open year round and heat it up a few times each month during the winter to swim. Then from March-Oct, I keep the temp comfortable for swimming. Do you have a recommendation for a gas heater that can handle the increased use and the salt water? Thanks for the advice!