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For continuous, precise control of ozone or CO2 injections in your aquarium. Each unit controls upper and lower ranges, cycling your equipment on or off accordingly to adjust pH or ORP readings. Each has a large LCD display and includes a probe for aquarium use. Replace electrodes approximately every 18 months. Both units have an amp rating of 5, and accept 3-prong plugs. pH Controller includes calibration fluids. 9-volt battery required (sold separately).Electrodes, adapter kit, and calibration packets also available.Please click on "More Information" for further details.

For continuous, precise control of ozone or CO2 injections in your aquarium. Each unit controls upper and lower ranges, cycling your equipment on or off accordingly to adjust pH or ORP readings. Each has a large LCD display and includes a probe for aquarium use. Replace electrodes approximately every 18 months. Both units have an amp rating of 5, and accept 3-prong plugs. pH Controller includes calibration fluids. 9-volt battery required (sold separately).Electrodes, adapter kit, and calibration packets also available.Please click on "More Information" for further details.

Electronic monitor continuously measures aquarium pHAccurately measures aquarium pH to 1/100th of a unitSimplifies the measuring and monitoring of aquarium pHConstantly monitor the pH of your aquarium. Precision pH monitor immediately detects changes in aquarium pH. Powered by a 9V battery (not included); "LOBAT" indicator signals for a replacement. Accuracy of andplusmn;0.01 and and large, easy-read display shows pH to 1/100th of a unit. Lab-grade epoxy electrode features a BNC connector. The PINPOINT pH Monitor comes complete with probe and calibration fluids. Measures 3" x 5". For salt or fresh water use.Replacement probe, adapter kit, and calibration packets also available.Please click on "More Information" for directions for use.

Electronic monitor for precise measurement of dissolved oxygenFast and accurate way to measure dissolved oxygen in aquariumsMonitor dissolved oxygen level for healthy aquarium inhabitantsThis monitor makes measuring dissolved oxygen easy. Accurately reads dissolved oxygen levels from 0 - 20 ppm. The versatile Pinpoint II Oxygen Monitor displays a digital readout for dissolved oxygen in either percent oxygen or ppm saturation. This affordable and accurate dissolved oxygen monitoring system is the preferred monitor in the aquaculture industry. Includes probe with 5 ft cord, extra replacement membranes and probe electrolyte. No calibration fluid needed. Operates for about 150 hrs. Runs on a 9V battery (not included).Electrodes, adapter kit, and calibration packets also available.Please click on "More Information" for directions for use.

Professional aquarium Oxidation Reduction Potential (ORP) monitorContinuously monitors aquarium ORP levels to ensure a healthy aquatic environmentEssential monitor for aquarium systems using ozone and ozonizersProfessional monitor constantly measures aquarium oxidation-reduction potential (ORP/REDOX). An essential aquarium-monitoring device for reef aquarium and other high-tech aquariums that utilizes ozone or ozonizers to break down organic waste materials. Precision probe instantly detects ORP/REDOX changes to help ensure overall health of your aquarium system.Large Liquid Crystal Display shows a 1 mV resolution with a ?1 mV accuracy (-2000 to +2000 mV range) and features a low battery indicator. Built-in offset screw for quick and easy calibration. Lab-grade, Ag-AgCl, epoxy electrode has full platinum band and BNC connector. Runs on a 9V battery (not included). Fully guaranteed. 3" x 5".Electrodes, adapter kit, and calibration packets also available.Please click on "More Information" for directions for use.

Easy-to-use portable digital calcium monitorPrecise LCD readout - displays calcium levels in ppmConvenient calcium testing for reef hobbyistsHigh-tech, digital calcium monitor simplifies routine testing. Just dip calibrated probe in water sample for quick and accurate measurement. No more mixing messy chemicals or waiting for results. Powered by a standard 9-volt battery (not included). Display Range of 000.0 9,772.0 ppm Ca+, Accuracy +/- 2 percent after calibration. 3" x 5". Includes calcium meter, calcium probe (7" probe with 10 ft probe cable with BNC connector) and calibration fluids.Calcium Monitor Fluid Kit includes 1 bottle each of 100 ppm Calcium Calibration Fluid, and 1,000 ppm Calcium Calibration Fluid.Replacement probe, adapter kit, and calibration packets also available.Please click on "More Information" for details.

Easy-to-use portable digital calcium monitorPrecise LCD readout - displays calcium levels in ppmConvenient calcium testing for reef hobbyistsHigh-tech, digital calcium monitor simplifies routine testing. Just dip calibrated probe in water sample for quick and accurate measurement. No more mixing messy chemicals or waiting for results. Powered by a standard 9-volt battery (not included). Display Range of 000.0 9,772.0 ppm Ca+, Accuracy +/- 2 percent after calibration. 3" x 5". Includes calcium meter, calcium probe (7" probe with 10 ft probe cable with BNC connector) and calibration fluids.Calcium Monitor Fluid Kit includes 1 bottle each of 100 ppm Calcium Calibration Fluid, and 1,000 ppm Calcium Calibration Fluid.Replacement probe, adapter kit, and calibration packets also available.Please click on "More Information" for details.

Professional aquarium Oxidation Reduction Potential (ORP) monitorContinuously monitors aquarium ORP levels to ensure a healthy aquatic environmentEssential monitor for aquarium systems using ozone and ozonizersProfessional monitor constantly measures aquarium oxidation-reduction potential (ORP/REDOX). An essential aquarium-monitoring device for reef aquarium and other high-tech aquariums that utilizes ozone or ozonizers to break down organic waste materials. Precision probe instantly detects ORP/REDOX changes to help ensure overall health of your aquarium system.Large Liquid Crystal Display shows a 1 mV resolution with a ?1 mV accuracy (-2000 to +2000 mV range) and features a low battery indicator. Built-in offset screw for quick and easy calibration. Lab-grade, Ag-AgCl, epoxy electrode has full platinum band and BNC connector. Runs on a 9V battery (not included). Fully guaranteed. 3" x 5".Electrodes, adapter kit, and calibration packets also available.Please click on "More Information" for directions for use.

Professional aquarium Oxidation Reduction Potential (ORP) monitorContinuously monitors aquarium ORP levels to ensure a healthy aquatic environmentEssential monitor for aquarium systems using ozone and ozonizersProfessional monitor constantly measures aquarium oxidation-reduction potential (ORP/REDOX). An essential aquarium-monitoring device for reef aquarium and other high-tech aquariums that utilizes ozone or ozonizers to break down organic waste materials. Precision probe instantly detects ORP/REDOX changes to help ensure overall health of your aquarium system.Large Liquid Crystal Display shows a 1 mV resolution with a ?1 mV accuracy (-2000 to +2000 mV range) and features a low battery indicator. Built-in offset screw for quick and easy calibration. Lab-grade, Ag-AgCl, epoxy electrode has full platinum band and BNC connector. Runs on a 9V battery (not included). Fully guaranteed. 3" x 5".Electrodes, adapter kit, and calibration packets also available.Please click on "More Information" for directions for use.

Precision instrument for the measurement of hardness in freshwaterElectronic conductivity monitor measures freshwater impuritiesAccurate way to measure and monitor water quality for aquarium useAccurately measure freshwater impurities. Anything that is not water (like calcium, silica, magnesium, nitrate, etc.), regardless of the amount, will be measured. The Pinpoint Conductivity Monitor is automatically temperature-compensated and has two ranges, making it useful for different applications. Measures in microsiemens (uS) but includes conversion formula for other scales of hardness. Runs on a 9V battery (not included).This precision instrument is perfect for serious discus keepers who add trace elements to pure water to achieve a reading of about 70 uS. Also useful for determining membrane effectiveness of reverse osmosis units. Regular tap water measures about 300-500 uS; good quality RO water measures 5-15 uS.Electrodes, adapter kit, and calibration packets also available.Please click on "More Information" for directions for use.