We have a pool service that has been using gas clorine for about a year. Without notice to thier customers they have switched to the old way of liquid clorine. The gas clorine was submerged by a tank in the diving well and the gas cloud was force out of the tank. I know that the gas burned the plaster at the bottom of the diving well. It is a perfect circle about a foot in diameter. The company denies that the gas clorine burned the plaster and will take no responsibility for thier methods. My question is will gas clorine burn plaster and are they liable to fix the pool?