I have someone at my house pressure washing today and my wife asked him about the black marks on the pool steps and if he could pressure wash them off. He said no but thought the black marks are from high copper levels.
I have not tested for copper in several years since I stopped going to the pool store for testing. I had used the Culater products before somewhat successfully after using copper algicide.
So how do you test for copper and also phosphates?
I have not tested for copper in several years since I stopped going to the pool store for testing. I had used the Culater products before somewhat successfully after using copper algicide.
So how do you test for copper and also phosphates?