The best replacement for no3 is no2.

The best alternatives to no3 are rated as following:
★★★★★  no2
★★★★  nh4
★★★  yok3d
★★  no2. stronger base
★★  no3-n
★★  hemavol
★★  nitrix
  no2 stronger base

Your alternative for no3 is not listed? Suggest!
Speaking about no3, one probably shouldn't forget about m5.

Other search terms related to no3 and their ratings are:
★★★★★ m5
★★★★ c4
You have in mind a companion for no3 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of no3 in all years. Click on graph for more.
no3
no2
nh4