Wow. This guy is a raging Jerk! Dave left me an irate voicemail because I decided to take the pool cover off myself and shock the pool. I still wanted him to test the water, clean the filter, and check the pump; but he told me that he «doesn’t work that way!» I’m sorry that I was trying to save myself a few dollars — the nerve of me! Not a very smart businessman. Avoid at all costs!