Im pretty sure i have diatoms in my tank, ive had them for about 3 weeks now.. Its a bunch of rust/brown algae on my sand and pumps. My lighting isnt old, my levels are all reading ok, i do schedule pwc's, i feed every other day, protein skimmer is working fine, and my flow is good, but i vaccum them up and there back the next day and worse... Do i have to just wait and let them die off? I have some pictures