Am building a pool and am still up in the air on sanitizers. This forum has taught me that tab systems are the least desirable. I really want a SWCG but am SUPER spooked about the damage to my coping and decking from the salt. Yes, sealing the stone is an option. I raised the issue of a liquid chlorine system and Stenner pump with the pool company and the saleswoman had no helpful information. They all seem to push tab chlorine systems in this part of Texas (DFW). This is very disturbing because it looks like if I want a Stenner system I will have to tell them what I need since they are not being very helpful or they simply don't know. The pool will be inground with attached spa totaling 18,000+ gallons. All direct sunlight for majority of the day. Can someone provide me some info as to what I need for a liquid chlorine system?