Buy 5 Low Range Nitrate Checkers and get 1 free! Add 6+ units to your cart and the credit will apply at checkout. Offer is for HI781 only and does not apply to reagents or related products.
The HI781 Marine Nitrate Low Range Colorimeter is designed to accurately determine low range nitrate levels in saltwater aquariums and marine applications. With a digital read out, there is no more struggling to determine colors visually.