Hanna Instruments Phosphate Ultra Low Range Checker® HC Reagents (25 Tests) (HI774-25)

HI774-25 Phosphate Ultra Low Range Checker® HC Reagents (25 Tests) by Hanna Instruments is a high-precision reagent kit designed exclusively for use with the HI774 Marine Phosphate Ultra Low Range Checker® HC. This set includes 25 individually sealed reagent packets, each formulated to provide consistent and accurate results when testing phosphate levels in saltwater aquariums.

Phosphate control is critical in reef systems, especially in tanks that house sensitive coral species. Even trace amounts of phosphate can contribute to nuisance algae outbreaks, inhibit coral calcification, and destabilize the overall balance of the ecosystem. Ultra-low phosphate levels—typically below 0.05 ppm (or 50 ppb)—are often required in modern reef-keeping practices. Accurate testing at these low levels is essential to monitor and manage nutrient levels effectively.

Using HI774-25 Phosphate Ultra Low Range Checker® HC Reagents is straightforward. To perform a test, start by filling the included cuvette with 10 ml of aquarium water. Insert it into the HI774 Checker to zero the device. Remove the cuvette, add the contents of one reagent packet, swirl or shake gently to dissolve, and reinsert the cuvette. Within a minute, the device will display a digital phosphate reading in parts per billion (ppb).

Each reagent packet is precisely dosed, eliminating the need for complex measuring or liquid solutions. This ensures consistent and repeatable test results while reducing the chance of error during the testing process. The single-use packets are also protected from moisture and contamination, maintaining their integrity until the moment of use.

With Hanna Instruments HI774-25, reef aquarists can perform ultra-sensitive phosphate tests with ease and confidence. This reagent kit is ideal for those who maintain ultra-low nutrient systems (ULNS), use phosphate media, or need to monitor nutrient dosing. It provides the reliability and accuracy needed for managing high-end reef environments, making it a trusted choice for serious hobbyists and professionals alike.