A Smart and Affordable Way to Power Your Aquarium Gear The HYDROS Power 4 WiFi Power Strip is a smart...

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

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

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...

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

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

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....

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

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

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...

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.  ...

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

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

Pinpoint ORP Redox 400 Calibration Fluid - 3 total packets

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...

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...

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

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

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

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

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...

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

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

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

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

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

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

Calcium is one of the most important elements in a reef aquarium. Reef invertebrates, such as corals, crustaceans, mollusks, and...

PARwise is a unique light meter with the ability to measure spectrum. It can be used underwater and in air....

The Marine pH Checker® HC® Calibration Check Set - HI780-11 provides a simple solution to validating the Marine pH Checker®...

Flow Sensor – 1/4″ with push-fit connectors  (FS-25) Usually used with aquarium accessories like RODI inputs, calcium reactor feed lines...

Protective Case for Milwaukee Refractometers

Reef Foundation Pro Test kit include individual test kits and the Reef Foundation Pro kit, which combines the 3 individual...

Red Sea Phosphate Pro - Reagent Refill Kit