Replace your 8-stage filter cartridge when you notice:

0 represents the neutral point on the pH scale

000 gallons or approximately 6 months

Black Berkey Primer™ can be cleaned with a proper dilution of natural cleaning products

Overtime Protection: Adjustable from 1 to 180 minutes or off to prevent excessive dosing

Hanna Instruments Ammonia Medium Range Checker Reagents (25 Tests)-HI715-25 food production Replace your 8-stage filter cartridgeThe HI715 25 are the replacement reagents for the HI715 Ammonia Low Range Checker HC. These high quality reagents are manufactured in our state of the art facility and are clearly marked with the lot number and expiration date on each bottle for traceability. Pre made reagents for ease of use Prepared with high purity chemicals Marked with expiration date and lot number for traceability The HI715 25 are high quality reagents that are pre measured,