The best replacement for nitrite is nitrate.

The best alternatives to nitrite are rated as following:
★★★★★  nitrate
★★★  nitrate aquarium
★★  nitrogen dioxide
★  nitride
★  sodium nitrate
★  leukocyte esterase
★  molybdate
★  butyl nitrite
  ammonia
  isobutyl nitrite
  amyl nitrate
  sodium phosphate
  amyl nitrite

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

Other search terms related to nitrite and their ratings are:
★★★★★ sulfanilamide
★ sulfanilic acid
★ leukocytes
You have in mind a companion for nitrite and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of nitrite in all years. Click on graph for more.
nitrite
nitrate
nitrate aquarium