The pH and ORP probes are now double-junction as well so they hold calibration longer and have a longer lifespan...

Pinpoint ORP Redox 400 Calibration Fluid - 1 packet

SALINITY/CONDUCTIVITY PROBE- LAB GRADE Start Measuring Salinity or Conductivity in your tank.  Get alerts when those values are out of...

PINPOINT ORP Replacement Probe 10 foot cord, Ag-Ag/Cl reference, platinum wire sensor, extended life, high supression cable jacket. Can be...

The HYDROS Control X4 PRO Pack includes the Control X4 & XP8 aquarium controllers, HYDROS App, temperature sensor, pH probe...

THE ULTIMATE MULTIPURPOSE FLUID-MONITORING DEVICE! The FMM (Fluid Monitoring Module) is a multi-purpose device that, with the help of various...

Never before offered in the aquarium industry the LLS Sensors allow for the measurement of water depth in inches or...

CarbonDoser Electronic CO2 Regulator V2.0 (complete system: with remote box option)   Now sold with the TUNZE (German Built) Regulator...

HYDROS Leak Sensor - Sense Port Accessory The HYDROS Leak Detection Sensor is a solid surface leak detector that can...

The HI781 Marine Nitrate Low Range Colorimeter is designed to accurately determine low range nitrate levels in saltwater aquariums and...

Salifert Potassium Reef TestPotassium concentration in natural seawater is approximately 400 ppm. Many aquarists have reported that a low potassium...

The Magnetic Optical Sensor replaces our optical sensor with magnet and offers an improved look, feel, and magnetic design that...

AutoAqua Smart Stir A magnetic stirrer for mixing water test reagents efficiently and effortlessly. LABOR AND TIME SAVING Water testing...

HI 758 Calcium Checker HC is supplied with 2 sample cuvettes and caps, reagents for 25 tests, (1)1.5V AAA battery,...

The Control X10 is the ultimate HYDROS system controller with twin Drive ports, four Sense ports, a pH/ORP port, a...

An Apex monitored aquarium is a successful aquarium! Introducing the exciting all-new A3 Series of Apex controllers. From the Jr....

The HI780-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Marine...

Get your replacement reagents for your HI781 Marine Nitrate Low Range Colorimeter today. These high-quality reagents are manufactured in our...

Solenoid Valve (SV-1) This 24VDC powered, normally-closed (NC), solenoid valve has push-fit tubing input and outputs designed for standard 1/4″...

Trident NP (Reagents sold separately) The best selling automated tester ever released has been modified to now test Nitrates and...

HYDROS Minnow, Aquarium Monitoring with Twin Micro Dosing Pumps The HYDROS Minnow features two independent micro-liquid dosing pumps for precise...

1 Full Box of 25 Single Packs   HI70024P is a premium quality 35.00 ppt salinity calibration solution that is...

The HI764-25 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their...

Protective Case for Milwaukee Refractometers

Hanna Marine Nitrate HR certified standard kit

HYDROS Sense Port Accessory   Monitor your RO/DI units' water quality with HYDROS Dual Inline TDS Sensor. Plugs directly into...

Half U Clips for Rope Leak (10pack)

Concentrated Reagent Specifically for Alkalinity Testing Machines A concentrated reagent for the HYDROS iV Tester, Focustronic's Alkatronic, and Kamoer KH...

Simplify the Way We Manage Flow Within Our Aquariums The HYDROS WaveEngine v2 can control, monitor, and even supply power...

A key ingredient to a great reef aquarium is maintaining proper levels of Alkalinity, Calcium, and Magnesium.   The Trident...

Sachets are sealed against light and air and are ideal for on-the-spot calibration. Simply open, insert the tester or electrode...

HYDROS Blenny is an aquarium controller with four micro-liquid dosing pumps for precise dosing of two-part and trace elements. It...

D-D True Seawater Refractometer   Hand held instrument for the measurement of the TRUE Salinity and Specific Gravity (S.G.) of...

The HI780 Checker HC (Handheld Colorimeter) is a simple, accurate and cost effective way to measure pH in saltwater.  ...

Please note: Cable will vary from photo, stock photo shown. Hydros Maxspect Gyre 330/350 WE Pump Adapter Direct Pump Driver...

PINPOINT" Salinity Calibration Fluid 53.0 mS standardized fluid for calibrating the PINPOINT Salinity Monitor"

3' Male/Male AquaBus cable.  Used to connect an AquaBus module (PM1, EB8, etc) to another AquaBus Module or Apex base...

Sachets are sealed against light and air and are ideal for on-the-spot calibration. Simply open, insert the tester or electrode...

Controller Designed for Continuous-Duty Liquid Dosing Applications The HYDROS Sole is an aquarium controller hybrid with a heavy-duty liquid dosing...

IceCap 2K Gyre Flow Pump with HYDROS WaveEngine LE Dual Pump Controller The IceCap Gyre is back and better than...

The Simplicity 3-in-1 New Tank Rapid Test is an easy-to-use test strip designed for the cycling process of both fresh...

Dalua Illumagic Pixel & Vitamini 24-Hour Auto Scheduler Dimmer The Dalua Illumagic Pixel & Vitamini 24-Hour Auto Scheduler Dimmer provides...

Red Sea MCP Marine Care Test Kit Easy-to-use tests for the accurate monitoring of all of the important parameters during...

Flow Sensor – 1″  (FS-100) Usually used with a return pump, this flow sensor can be placed in line with...

High sensitivity seawater nitrate test kit highly sensitive reagents professionally calibrated colour chart differentiated colour gradations precise sliding comparator sample...