HI784-25 Hanna Marine Ammonia Reagents — 25 Tests for Checker HC HI784 - Hanna

Hanna HI784-25 marine ammonia reagents — 25 tests for Checker HC HI784

The Hanna HI784-25 reagents are the dedicated reagents for the Hanna Checker HC HI784 Marine Ammonia colorimeter. Each box has 25 tests calibrated to the HI784 LED and chemistry. The method is an adaptation of the Salicylate method, formulated specifically for saltwater — no false readings due to salinity, unlike some freshwater ammonia tests.

What these reagents bring

• 25 saltwater-tuned ammonia tests for reef aquariums.
• Salicylate method — 0.01 ppm precision across the 0.00-2.50 ppm range.
• Pre-measured sachets, standardised 2-3 step procedure.
• Genuine Hanna reagents — the only chemistry guaranteed on the Checker HC HI784.

How to use

• Rinse the cuvette with RO water and sample water.
• Fill to the mark, insert, press Zero.
• Add HI784-25 sachet A then B, agitate as per Hanna timing.
• Reinsert and press Read after the specified delay.

Specifications

• Reference: HI784-25
• Number of tests: 25
• Compatible with: Hanna Checker HC HI784 Marine Ammonia
• Method: adaptation of the Salicylate method
• Range: 0.00 to 2.50 ppm NH₃
• Storage: dry, room temperature, out of direct sunlight.

Why get these reagents from ReefSolution

• Hanna Checker HC HI784 marine ammonia — the colorimeter these reagents pair with.
• Hanna HI782-25 nitrate HR reagents — to track NO₃ alongside ammonia.
• Hanna HI764-25 nitrite ULR reagents — to round out nitrogen-cycle monitoring.
• Hanna Checker HC HI772 dKH alkalinity — the reef parameter that shifts fastest.

Frequently asked questions

How many tests are in a box of Hanna HI784-25 reagents?

25 tests — one per measurement on the Hanna Checker HC HI784.

Are these reagents saltwater-safe?

Yes — the Salicylate formulation is calibrated for saltwater with no false reading due to salinity.

When should I measure ammonia on an established reef aquarium?

Not often on an established tank — mostly during cycling, after a large livestock addition, or to confirm a nitrogen spike after an incident (animal death, skimmer failure).