Kent Pro Plant is the fert that has the nitrogen in it
Contents: Deionized water, Sodium Nitrate, Magnesium Sulfate, Boric Acid , humic acid, kelp extract.
1-0-0
Total Nitrogen 1%
Boron .0002% (min.)
Magnesium .05% (min.)
Sulfur .06% (min.)
I use about half the recommended dose for my tank 3x per week.
ammonia and Nitrites are at 0