Thanks to our lovely neighbor Bill for recommending this gentleman. He's very professional, knowledgeable, and courteous. Mr. Parks was very accommodating, especially after I called him after seeing the many reviews from our neighborhood FB page. He showed me the gunk that collected so it was long overdue. I highly recommend him; he's well worth the money spent, considering the alternative of replacing the entire tank would have cost an estimated 3-4K. If you are in need of this service please do not hesitate to call, you will not be disappointed!