Found it! The article was written for saltwater tanks, but the information also applies to freshwater tanks.
Good info on diatoms:
Good info on diatoms:





The RZ shot is my fave by far.
My fish dont usually run away when I approach, instead, they flood the lens so its difficult for me to single out any one fish. I had plenty of great shots, in perfect focus on the subject, but someone else decided to get in the way

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