Hey guys new here I have a 40 gallon with mixed from malawi rivers. I have two Magnus 350 filters. The other day I did a 25% water change and dicited to rinse out the media with filtered water. I put water treatment and stress coat. Turn everything on couple minutes later water got dark greyish color. 30 hours have passed by its not clear but its getting there.just test the water a couple minutes ago. ammonia is 2.0 nitrate is. 40 high ph is 7.4 and nitrite is at 0.