Quick, reliable, and always easy to use.

This economical pH tester makes testing your pH a snap. The calibration procedure is very simple and fast. Tester includes calibration screwdriver and batteries.

This controller allows you to monitor the pH levels in your aquarium and to automate the dosing of CO2. pH controller features manual 2-point calibration, accuracy of .2 pH, set ...

Combined glass pH electrode, refillable with BNC connector, 3m cable.

Portable lux meter features a waterproof sensor that displays a precise reading of light intensity. Accurately measures a range of 0.000 to 50,000 Lux.

The Milwaukee SM801 includes Automatic Temperature Compensation, 0 to 50 C, calibration solution and replaceable probe (MA850).

Simply the best way to check your marine aquarium salinity. This refractometer is an optical device requiring no batteries.

Simply the best way to check your marine aquarium salinity. This refractometer is an optical device requiring no batteries.

This controller has a user selectable set point for ORP. Simply plug the ozone generator into the controller's power plug and it will dose until the mV set point is reached.

Measures ammonia (NH3) at a range of 0.00 to 3.00 mg/L and is accurate to plus or minus 0.04 mg/L @ 1.50 mg/L.

Replacement electrode for Milwaukee SM101 and SMS122.

The Milwaukee Instruments Iron Photometer measures iron from 0.00 to 5.00 mg/L at an accuracy of plus or minus 0.03 mg/L @ 1.50 mg/L.

Milwaukee's solenoid valve can be used in both freshwater and saltwater applications where liquids or gases need to be controlled with precision.

Will detect even the smallest amount of phosphate in your aquarium. Capable of determining phosphate levels between 0.00 to 2.50 mg/L.

easy to use, water proof tester that is accurate and automatically compensates for temperature.