I am trying to give myself a buffer for water changes. Right now ammonia and nitrites are stable, and nitrates rise as expected. I'd like to know what other steps I can take to reduce the rise inn my nitrate levels.
I have seen these star things which are supposed to drop into the filter, but I'm pretty sure those are for the ammonia and nitrites, as bacteria that eat nitrates don't grow in oxygen rich waters.
I have a 20 gallon long planted community aquarium with a log, a few porous rocks, and an emperor 400 filter (big sale). I'd like to know aside from the plants, what else can I do to reduce nitrogen levels? I'm not trying to eliminate water changes.