Hi, John. Glad to have you here. When I modded in your post, I deleted your phone number and email address. Not usually a good idea to put those on a forum. Well water is difficult to deal with when you put it in a pool. Don't add anything else at this point. I don't know anything about a product called EZ clear or how to handle a situation involving manganese. I'm going to ask Ben to specifically take a look at your post. If anyone can help with manganese, he would be the one. Sit tight for now.