API NITRATE TEST KIT FOR FRESH AND SALTWATER by API Sold out $12.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out Tests nitrate levels from 0 to 160 parts per million. High levels of nitrate are a food source for unwanted algae and indicate poor water quality. Keep out of reach of children. Solution #1 contains 41 percent hydrochloric acid.
