Hello, my name is Grace and I have a home near Sarasota, Fl. It is a + or - 8,000 gal. salt water pool with a spa. The pool is about 7 yrs. old and we have not had any problems other than some mechanical parts and snakes going into the heater in winter.
We left the house on Labor day weekend (9/1) and went back to NY. On Sept. 10, I received an email from the person who takes care of the pool telling me that there are enormous black spots all over the pool. They were not there the week before and when we left the water was nice and crystalline. He said they were not there the Tuesday after Labor day when he came and on 9/10 they were all over the place. He said he applied "Sea Klear 90 day algae prevention and remover". when he came back on 9/17, the application did not work. He said that he concluded that it was NOT organic because the application did NOT work.
I arrived in Fl. last week and took the water to be tested at the local pool store and they told me that it was OK and clear. Our pool person sent a friend of his to look at the pool because he said he'd never seen anything like it. The new person told me right away that it was an EXTREME case of COPPER PLATING. He said water whether heating or not goes thru the heater and touch the copper coils in there. When the water gets saturated with copper, it splits and attaches itself to the walls. TREATMENT: We need to empty the pool, acid wash it and refill it. I spoke to several home inspectors and realtors whom I know and they all CATEGORICALLY told me that they never heard of or saw anything like it.
I don't know what to do. I know my pool person is not the best at it, he just cleans pool well and is reliable, but that's all.
Today, the Manatee County water department came and took samples of the pool water and even scraped the wall where the dark spots are. They are going to test for copper.
Any suggestions? Has anyone seen anything like it before? If we need more advise, where do we turn? I would appreciate any input from you. Thank you. Grace If you'd like to see pictures of the spots, pls send me your email addr and I'll send them. Thanks.