We just installed an inground fiberglass pool last summer. It was installed in July and our salt water system started showing low salt around September. We checked salt levels and it was at 3400 ppm. All other levels were in operating range. We contacted the pb and he contacted the local Pentair technician. After waiting a month for the technician to show up he ended up putting a new unit on the pool and it also showed low salt. He had to order another unit and it was installed roughly a week later. This is now approximately October/November and the water was too cold for it to make salt. We are now getting the pool ready for the summer and it is still not making salt. This past week end we put a bag of salt in the water and the salt light turned from red to green the next morning, but by that same evening it was red again. We have contacted the pb again and he is going to have the technician come again. But I'm afraid with the beginning of pool season that we are going to have to wait for the technician and I'm tired of buying chlorine for our trouble free pool. Does anyone have any ideas of what could be wrong with my salt water system?