More questions about copper

More questions about copper Re: Budgeting Copper: TMDL’s Origins and Costs (March 13 issue). I own a 55 foot. pilot house trawler that is at San Diego Yacht Club. When I brought the boat from the East Coast in 2008, I decided to put non-toxic bottom paint on the boat. The product was put on my boat’s bottom at Shelter Island Boat Yard. I was not impressed with the longevity of the product so in 2010 I switched to a different non-toxic bottom paint put on by the same yard. The continued disappointed quality of the non-toxic paints became apparent when they didn’t last very long and my bottom cleaning had to be kicked up which was more expensive. In 2012 I put a low copper (38 percent) paint on the bottom of my boat and I was much happier with the frequency of bottom cleaning I needed. This year (2015) I repeated with the same bottom paint. This time I am experimenting with not having a diver clean the paint for a number of months. I will have him clean the metals, thru hull entrances and transducer. I do think it is important to not have any aggressive cleaning of the...