So as a backstory.. my tank is currently just under 5 months old. In hindsight, I am aware that I screwed up a bit in the beginning right after cycling by starting to dose NoPox and Vibrant and wasn't paying attention to my nutrient levels. When I did test, I found NO3 and PO4 to be at or near 0. At the end of July I started to get some brown "algae" growing on the sand and quickly spreading up the rocks. I started dosing Neophos and NeoNitro about 1.5 months ago and finally got NO3 to about 9ppm and PO4 to .06. The outbreak got pretty bad for a couple weeks and I have been removing as much as I can daily. I also have been running a 55W UV since after cycling. I was hoping this was just a case of the uglies with diatoms, but after I got my microscope today, it looks more like dino's. I am hoping someone can give me a positive ID on this and maybe give me some pointers on a plan of attack. Thanks in advance!