Is there a way to test a SWG to see how if it's working? This is a used SWG that the company sent me because the original was still under warranty, but apparently the company doesn't make SWGs. I have a feeling that the SWG has never worked. The company claims that I have too high of phosphates or nitrates and that is why the SWG cant keep up. Does this sound bogus or legit? I have run the SWG on turbo, which means its running at 100% for 10 hours a day and if I don't add chlorine the pool turns green. Any help would be appreciated.