ORP mV Meters are the most accurate way of testing you water quality, the higher the reading the better your water is. We offer a full range of meters for everones budget.

What is ORP and REDOX?

Redox or better know of short as ORP is eminently important as an indicator not only of a system's capacity for cycling waste, but indeed of chemically supporting fish, plant, and invertebrate life. There are both oxidation (e.g. biological conversion of ammonia to nitrites to nitrates) and reduction (ridding systems of nitrate aka denitrification, bio-phosphate PO3) that must occur readily in a truly closed system to support microbe life.

Redox is measured indirectly as the ability of an aquatic system to conduct electricity, in millivolts (mV, 1/1000 of a volt). Hence the term Redox potential, or, if you will, ORP for, you guessed it, Oxidation-Reduction Potential. Testing can be done periodically, but ORP can change so rapidly that in order to fully benefit, most people who are so inclined, check the reading on a daily basis.