Hanna Phosphate Low Range Checker Reagents (25 Tests) - HI713-25

These are replacement reagents for the Hanna HI713 Phosphate Low Range Checker HC, supplied as 25 individual packets (HI713-25). Each packet is a single test, so you can restock your checker without having to buy a whole new unit.

The reagents come pre-measured, so there's nothing to weigh out or mix beforehand. You add a packet to your water sample and let the checker do the reading. The test uses the Ascorbic Acid Method, which turns the sample a blue tint. The HI713 reads that colour and displays the phosphate level in ppm (mg/L). The method follows Standard Methods for the Examination of Water and Wastewater, 20th edition. Every packet carries a lot number and expiration date, so you can see at a glance whether your stock is still in date.

They suit reef and marine keepers who already own the HI713 checker and want to keep tracking phosphate, particularly if you're working to keep nutrients low in a coral-heavy system. The test is designed for samples in the 0.00 to 2.50 ppm range.

Specs: SKU HI713-25, Phosphate Low-Range Checker Reagents, 25 tests supplied as packets, Ascorbic Acid method with a blue tint colorimetric reaction.