I am trying to keep my Nitrates below 40ppm but not having much luck. I have a 80 gallon tank with 4 Emperor 400 filters running at about 1/3 flow. I have about 12 Water Wisteria plants, about 30 guppies, 30 blue velvet shrimp and 6 Amano shrimp.
I feed once a day and everything cleans it up in less than 10 minutes. For plant fertilizer I am using CO-Ops Easy Root Tabs and Easy Green as directed and a Fluval light.
When I change water I do about 40 gallons about every 10 days.
Any idea how I can keep the Nitrates lower?