AZNO3 where to dose?

[ASIN28]

I am going to begin using AZNO3 to remove nitrates in my aquarium. Where should this be dosed? Directly to the tank or through a filter sock or skimmer intake?
Thanks

 

[Arego]

I did return chamber but the product never did anything for me. This was years ago before I got things to click into gear.

 

[Randy Holmes-Farley Verified Community Expert]

AZNO3 is, I believe, just an organic carbon dosing method, like vinegar or vodka or NOPOX.

I liked to dose upstream of a large rock filled refugium to encourage bacteria to grow there rather than somewhere visible in the display tank.