- Joined
- Nov 25, 2024
- Messages
- 17
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- 3
- Location
- Villanova
- What state or country do you live in
- Pennsylvania
I have brown/red build up in my sand. I have plenty of flow and nitrates and phosphates are at good levels. I have been adding Microbacter 7 for a week now to no avail. I also tried Chemiclean and that did not work either. I have included a photo below. Are these diatoms or detritus or something else?



