ICECAP Y CABLE Advanced Controller Y-Cable for Reef Octopus VarioS Controller This 6.5ft cable allows you to independently control two...

The HI731315 are spare glass cuvettes and plastic caps used with the HI7XX Checker® HC colorimeters. Each cuvette has a...

Power Supply – 24VDC 36W (PS-36-US) This 24VDC, 36W power supply is used with the FMM so that you can...

50% OFF, these expire 6/2025, acutally probably good for another 6 months after that.   Silicate Test Silicate occurs especially...

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

Six Pack of ICP Total Water Tests The Fauna Marin Reef ICP Total Test gives a quick, accurate, and easy...

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

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

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

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

HYDROS 9ft Sense Extension Cable   This 9ft long extension cable for HYDROS Sense Accessories for Control 2 and Control...

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

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

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

The HI98108 pHep+ pH tester provides high accuracy measurements in a rugged pocket-sized design. This meter features an exposed temperature...

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

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

Red Sea’s Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC/77 0F....

Pinpoint ORP Redox 400 Calibration Fluid - 3 total packets

COPPER PROFI-TEST Copper can be present in tap water and in salt mixes. If the copper concentration is higher than...

Pinpoint ORP Redox 400 Calibration Fluid - 1 packet

Conductivity / Salinity Calibration Solution - 53.0 mS - 1 packet NOTE: Using this solution on a salinity or seawater...

The HC-0810M Finnex controller offers a precision digital control with LED digital display which maintains water temperatures at a constant...

Hanna Instruments Marine Algae & Nutrient Management Kit Easy-to-read, instant digital results Compact and portable Simple one-button designs and straightforward...

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

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

Our Marine Ammonia Checker HC (HI784) is designed to accurately and quickly determine the ammonia level in marine (saltwater) samples....

CoralVue HYDROS DC Solenoid Valve The HYDROS DC Solenoid Valve is a handy HYDROS Control 2 and Control 4 accessory...

HYDROS Skimmer Sensor - Sense Port Accessory The HYDROS Skimmer Sensor serves a very specific and important role: it prevents...

Half U Clips for Rope Leak (10pack)

Precision device with fine adjustment for standard CO2 cylinders, thread in keeping with German standard DIN 477 (US version with...

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

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

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

The PINPOINT pH Monitor" is in use by thousands of customers worldwide. This affordable unit remains the only full-time pH...

The first expansion module, the PM1, with a pH or ORP, temperature, and 6 digital inputs. The PM1 features are:...

The only salt water Alkalinity Tester at this price! Easier to use and more accurate than chemical test kits Colorimetric...

The HI731331 are the replacement glass cuvettes used with the HI96 series portable photometers and turbidity meters. Each cuvette has...

Octopus� Ground Probe �Highly recommended for all aquariums to prevent stray voltage from affecting marine animals.

CONTROLLER ONLY. Requires a mobile device and power supply (not included) and a Salinity Probe Kit for conductivity monitoring (also...

Isolation is the Key to Accurate Tests About HYDROS iV PRO Drive Port Accessory To obtain precise pH and conductivity...

Includes the Trident NP + 2 Month NP Reagents Trident NP The best selling automated tester ever released has been...

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

This HYDROS Force Port Power Cable is used to connect the Kraken to power a WaveEngine LE, WaveEngine, XD, or...

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

CoralVue HYDROS Sense Port Accessory   The HYDROS Flow Sensors are easy-to-install and measure the flow rate of water passing...

CoralVue HYDROS Sense Port Accessory   The HYDROS Flow Sensors are easy-to-install and measure the flow rate of water passing...