I just did that. that’s what has started this problem. I had high nitrates. so I did what I thought was right, mixed up some saltwater for a 25% change. When doing the water change the following happened:
White very tiny spots that I first thought were bubbles started to appear, most were gone after 24 hours. figured I stirred up something. everything was good. Cloudiness lingered and still is. All my other tests came out normal. My alk. is way low... still. As I was kind of explaining before, it never turned green. only dark blue, then straight to that color above, then got more yellow as I tried to see what would happen if I continued to test... idk what to do