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

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

High sensitivity seawater calcium test kit easy conversion factor accurately to 5mg/l precise dosing tip precise colour change separate indicator...

Pinpoint ORP Redox 400 Calibration Fluid - 3 total packets

Protective Case for Milwaukee Refractometers

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

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

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

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

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

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

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

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

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

This is a ten foot Male/Female extension cable that will enable you to remotely locate DC24 accessories like the PMUP....

Please note: CONTROL X3 ONLY - Nothing else is included. Achieve Ultimate Aquarium Control with the HYDROS Control X3 The...

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

It doesn’t just make SENSE, it Controls too! The HYDROS Control XS Starter Kit is the ideal solution for small...

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

Please note: CONTROL 4 ONLY - Nothing else is included.   Achieve Ultimate Aquarium Control with the HYDROS Control 4...

The HYDROS WaveEngine APX Link allows you to connect the WaveEngine's 0-10V input port directly to a third-party aquarium controller...

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

The Phosphate Ultra Low Range Checker® HC Calibration Check Set provides a simple solution to validating the Phosphate Ultra Low...

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

Neptune Apex Display Module

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

Red Sea Magnesium Pro - Reagent Refill Kit

Red Sea Alkalinity Pro - Reagent Refill Kit

PINPOINT ORP Monitor" will measure the ORP (oxidation-reduction potential, or REDOX) of your system. It is popular with those who...

Breakout Box Connect external switches and I/O Inputs to your Apex When connected to the I/O Port of your Apex,...

With Milwaukee's MC Controllers you can monitor and control pH and/or ORP levels.    The Milwaukee Instruments "MC" Controllers have...

MA957 CO2 Solenoid Diaphragm Valve Includes flow regulator, needle valve, electronic solenoid & bubble counter. Unit comes with dual gauges...

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

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

To be used with cuvets (item number HI-731331, not for photometer cuvets)for photometers and turbidity meters. They are notched to...

The HI731321 are the replacement glass cuvettes used with the HI7XX Checker HC colorimeters and the HI832XX benchtop photometers. Each...

Probe holder can fit up to four probes. Its design to hold ph, ORP, salinity and/or temp probe. It has...

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

Effortless Water Testing The IceCap Magnetic Aquarium Test Kit Mixer is a simple solution for efficiently mixing water test reagents....

AQUA Lifter Pump High Pressure (Brushless) - Not a standalone unit.  Requires an Autoaqua unit to run.   Model: LP-1800...

Hydrps Diaphragm Water Pump The HYDROS Diaphragm Pump is a small 12V Drive Port accessory that uses positive external displacement...

The Kraken introduces a new concept in aquarium controllers and provides high-power 24V DC switched outputs and a large heavy-duty...