{"product_id":"hanna-nitrate-low-range-reagent-hi781-25","title":"HI781-25 Hanna Nitrate Low Range Reagents — 25 Tests for Checker HC HI781 - Hanna","description":"\u003ch2\u003eHanna HI781-25 nitrate low range reagents — 25 tests for Checker HC HI781\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHanna HI781-25 reagents\u003c\/strong\u003e are the dedicated reagents for the \u003cstrong\u003eHanna Checker HC HI781 Marine Nitrate Low Range\u003c\/strong\u003e colorimeter, built to measure nitrate accurately on ULNS reef tanks where NO₃ stays below 5 ppm. Each box has 25 tests. The chemistry is zinc reduction, calibrated for the low-range sensitivity of the HI781.\u003c\/p\u003e\n\u003ch2\u003eWhat these reagents bring\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e25 tests calibrated to the HI781 LED and chemistry.\u003c\/li\u003e\n\u003cli\u003eZinc reduction chemistry — the same used on the HI782 (high range) but dosed for low-range sensitivity.\u003c\/li\u003e\n\u003cli\u003ePre-measured sachets — no scale or pipette.\u003c\/li\u003e\n\u003cli\u003eGenuine Hanna formulation, reproducible test to test.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow to use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRinse the cuvette with RO water and sample water.\u003c\/li\u003e\n\u003cli\u003eFill to the mark, insert the cuvette, press Zero.\u003c\/li\u003e\n\u003cli\u003eAdd one HI781-25 sachet and agitate as per the Hanna datasheet.\u003c\/li\u003e\n\u003cli\u003eReinsert and press Read.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eReference: HI781-25\u003c\/li\u003e\n\u003cli\u003eNumber of tests: 25\u003c\/li\u003e\n\u003cli\u003eCompatible with: Hanna Checker HC HI781 Marine Nitrate Low Range\u003c\/li\u003e\n\u003cli\u003eMethod: zinc reduction\u003c\/li\u003e\n\u003cli\u003eStorage: dry, at room temperature, out of direct sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy get these reagents from ReefSolution\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe Hanna Checker HC HI781 colorimeter is not currently stocked — contact us for a special order.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/en\/products\/hanna-nitrate-high-rage-reagent\"\u003eHanna HI782-25 — nitrate high range reagents\u003c\/a\u003e\u003c\/strong\u003e — the HR version (0-75 ppm) if nitrate goes above the LR range.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/en\/products\/hanna-alkalinity-checker-dkh-h1772\"\u003eHanna Checker HC HI772 dKH alkalinity\u003c\/a\u003e\u003c\/strong\u003e — to complete the reef station.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003ca href=\"\/en\/products\/hanna-checker-phosphate-ultra-low-range-hi-774\"\u003eHanna Checker HC HI774 phosphate ULR\u003c\/a\u003e\u003c\/strong\u003e — the PO₄ counterpart on hungry SPS tanks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eHow many tests are in a box of Hanna HI781-25 reagents?\u003c\/h3\u003e\n\u003cp\u003e25 tests — one test per measurement on the Hanna Checker HC HI781.\u003c\/p\u003e\n\u003ch3\u003eCan I use HI781-25 reagents on the HI782 Checker?\u003c\/h3\u003e\n\u003cp\u003eNo. Each reagent reference is calibrated to its matched Checker HC. HI782 uses its own HI782-25 reagents.\u003c\/p\u003e\n\u003ch3\u003eWhen should I use a Nitrate Low Range Checker instead of High Range?\u003c\/h3\u003e\n\u003cp\u003eThe LR HI781 is meant for ULNS SPS reefs where NO₃ stays under 5 ppm; the HR HI782 (0-75 ppm) fits FOWLR or higher-nutrient reef tanks.\u003c\/p\u003e","brand":"Hanna","offers":[{"title":"Default Title","offer_id":39388111274155,"sku":"HI781-25","price":27.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/products\/HI781-Reagents-and-Box-1000x1000__95052.1606837110_1280x_98491e03-c826-40bf-b5ea-a264be384d30.jpg?v=1616019086","url":"https:\/\/reefsolution.com\/en\/products\/hanna-nitrate-low-range-reagent-hi781-25","provider":"Aquarium ReefSolution inc.","version":"1.0","type":"link"}