Hanna Marine Nitrate High Range Reagents – HI782-25

Hanna HI782-25 is a 25-test replacement reagent pack for the HI782 Marine Nitrate High Range Checker. The packets support its zinc-reduction method for saltwater nitrate samples within the instrument's 0.0–75.0 ppm range.

Use the refill with the HI782 procedure and cuvette setup. Correct mixing and reaction timing let the instrument interpret the pink color that develops, so follow each step even when repeating a familiar aquarium test.

This high-range refill should be matched by model number when purchasing consumables. It is not the reagent set for the HI781 low-range marine nitrate Checker. Check expiry dates and keep unused packets sealed so the next series of readings starts with suitable test chemicals.