Your representative,was very professional, & it appeared he knew what he was talking about. It was raining, so he put booties over his shoes when walking in our house. I'm waiting for the estimate to correct the problem with my spa. If I have to reply using your computer program, it isn't going to happen. I'll call you! Will your estimate include adding the necessary chemicals to properly balance the system, or do I need to call someone else to do that? Yes, I have someone, who has been doing my spa for years.