Here's a quote from Seachems website: "Use 5 mL per 680 L (180 US gallons) twice a week (or as needed). This dose increases total nitrogen by 0.24 mg/L. This is the same amount of nitrogen that would be present if all nitrogen were present in the nitrate form at 1 mg/L. "
So 5ml/180g increases N by what would be 1 ppm expressed as NO3. It might be easier to calculate based on that.
Last edited by Jeff5614; 07-13-2018 at 01:06 PM.
Reason: brain fart