- Joined
- Feb 14, 2020
- Messages
- 1,685
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- Location
- Windemere, Lake District
- What state or country do you live in
- United Kingdom
What do people use as a filter media in sump to control nitrates? I used Seachem Matrix but it didnt really make a dent so looking to try a different media, any recommendations? My nitrate is currently 35-40 but want it ideally at 10-20 and dont want to go down chemical route.

