This isn’t so much a post about how to fight them I just want to know how I got them again and what I can do to prevent it coming back a third time once I beat them. Little bit of history... I had ostreopsis Dinos and beat them fairly easily a few weeks back. A couple weeks I noticed the same stuff this time more localized to the sand and hard corals and didn’t disappear as much at night. I believe it’s a different species but looked very similar to my first ID of ostreopsis. My old microscope went bad and my new one won’t focus as well so I can only guess at like 150x magnification. My nitrates are 10-25ppm and phosphates 0.05-0.1ppm always since I last beat Dinos. I’m currently dosing live phyto, pods, and MB7. Plugged up my super overpowered UV yesterday. Started manual removal today and will start changing the filter socks daily again. So main questions... what caused them to come back with such elevated nutrients and anything else I can do to beat them?