My 2 month old tank has single digit nitrates and zero phosphates. At this point everything looks good except for a brownish “dusting“ of what I suspect are diatoms. It’s very sparse on the gravel but I’ve needed to clean the glass every 3 days or so. Other than establishing a healthy pod population is there anything else I should be doing? I’ve ordered a microscope and am curious if there’s a site to help me identify what I’m going to be looking at. Thanks in advance.