Having a fish only tank my nitrates have never concerned me that much. Then I read an article, for got where, that long term effect can be harmful to fish organs. My nitrates were off the charts 100+++. So I added macro algae little effect, I rinse all my frozen food in RODI water, little effect, I use only RODI water for water changes, little effect. So last Christmas Santa bought me a Aqaripure filter and with in year my nitrates are at 10. I have run the filter on the middle settings and feed it twice a week, with the cheapest Vodka I could find. So on Wednesday and Sundays I do shots with my filter (1 for the filter 2 for me). I have set up the pump in the sump were the sock are and the return water drips into the return pump chamber. The only issue I have had is the the line from the pump runs past my light for the macro so it filled with algae and I had to clean it out. The pump the send with the unit is cheap had to replace it a year and half with a better pump. As for the system I think works good, just my two cents.
I'm not familiar with the Aqaripure, is this a sulfur-based denitrator?

