This is going to be an updated thread with pictures once I get my microscope in. Background to what I believe caused them. My phosphates were rapidly increasing so I ran some gfo. The phosphates never got to zero but they did drop rapidly even only using 1/2 cup of gfo on a slow flow. Lowest I saw them go to was .05. Once I saw what I believe are Dino’s I stopped GFO and I’m letting my tank run higher nutrients. Last night when I tested I was at .14 phos and 12.5 nitrates. I’ve also been dosing mb7 for about a week. Here is a picture of what I pulled out of my tank tonight. I added hydrogen peroxide to the sample and did not see any bubbles. Will post a picture of what I see with a microscope. I’m just trying to keep things stable with nutrients and have been blowing my tank off with a turkey baster and catching everything with a filter sock daily.