Was hoping for some help on figuring out what I’m dealing with on my sand bed. Seems to be confined to just the sand bed for about 3 months now. It is not stringy, So I’m pretty sure it’s not Dino. Could this just be diatoms? And what can I do to help rid of it? I’ve been vacuuming the top layer of sand out of my tank for the last month (I want a smaller sand bed anyway) and my nutrient levels seem to be in check when I test them weekly. Phos around .07 and nitrate between 1-5. I also test my RODI water and that is reading 0 TDS. So not sure why I can’t get rid of it.