Hanna Checker Phosphate Ultra Low Range Reagent 25 Tests HI774-25

Hanna HI774-25 replenishes the reagent supply for the HI774 Marine Phosphate Ultra Low Range Checker. The pack provides reagents for 25 tests using the matching instrument's marine phosphate method.

Add a packet only as directed by the HI774 procedure, after preparing the sample blank. The reagent produces the color change that the Checker measures; consistent mixing, timing and cuvette handling are part of the test, even though the final result appears digitally.

Match this refill to HI774 when restocking. It is distinct from HI713 low-range phosphate and HI736 phosphorus supplies. Store the unopened packets according to their label and check expiration dates before relying on a result for an aquarium maintenance decision.