nutrience

Hey guys I currently have a nutrient issue with my tank i’m having trouble solving. My nitrates slowly bottom out to 0 while my phosphates raise. This is forcing me to dose nitrates which I don't want to do if possible. Due to the imbalance I even got dinos which I have since resolved. Current...

I just came back from a week long vacation and found this stuff has completely taken over my sump. Any idea what it is and how to get rid of it?