The HI783-25 are the replacement reagents for the Marine Magnesium Checker® HC - HI783. These high-quality reagents are manufactured in...

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

Please note: Cable will vary from photo, stock photo shown. HYDROS Reef Octopus Varios 2/4 & OctoPulse 2/4 WaveEngine Pump...

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

This cable is the 4-pin male to male cable many of you have been waiting for. It is ten feet...

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

The MA911B/2 probe is lab grade, gel-filled pH probe for use with Milwaukee Monitors and Controllers.   DESIGN FEATURES Top...

5 x  Single Pack of Fluid (5 packets total)   HI70024P is a premium quality 35.00 ppt salinity calibration solution...

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 HYDROS Leak Detection Rope Sensor is the first of its kind in the aquarium industry. The moment water comes...

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

1 Single Pack of Fluid   HI70024P is a premium quality 35.00 ppt salinity calibration solution that is NIST traceable...

Includes Calcium, Nitrate, Phosphate, pH, Alkalinity & Magnesium

Please Note: The New EB 832 is not compatible with the classic Apex or Apex Jr systems.   ENERGY BAR...

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

Ammonia and ammonium are substances which should be converted rapidly into nitrite followed by nitrate and nitrogen gas. If this...

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

PINPOINT" High-Precision pH Calibration Fluids 4.000 +/- 0.002 7.000 +/- 0.002 10.000 +/- 0.005 These come in single-use plastic envelope...

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

pH Value @25C 7.01 Size 20 mL sachet HI70007P is a premium quality pH 7.01 calibration buffer produced in accordance...

Please note: Cable will vary from photo, stock photo shown. Hydros Third Party Controller WE Pump Adapter Direct Pump Driver...

The ATI ICP-OES Basic Water Analysis is a laboratory water analysis of 40 parameters in a reef tank that provides...

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...

Expand Your Possibilities Mix and Match your Favorite Equipment!   Scheduled Feeding With the Apex, you can easily start a...

Smart. Safe. Quiet. The ReefATO+ is designed to maintain a stable salinity and water volume in a reef aquarium by...

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...

Marine Master Waterproof Wireless Multiparameter PhotometerpH, Alkalinity, Ammonia, Calcium, Magnesium, Nitrate Low Range(reagents sold separately), Nitrate High Range, Nitrite Ultra...

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

For the Most Accurate Home Testing, Use Multi Reference! With Fauna Marin Multi-Reference Solution, you can test your home test...

    Please note: CONTROL XP8 ONLY - Nothing else is included.   Achieve Ultimate Security with the HYDROS Control...

Hanna Marine Nitrate HR certified standard kit

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

CoralVue HYDROS DC Micro Pump With a HYDROS DC Micro Pump and a HYDROS Optical Water Level Sensor (or Float...

HYDROS Temperature Sensor - Sense Port Accessory The HYDROS Temperature Sensor is an easy and affordable way to prevent your...

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

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

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

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

The HI702-25 are the replacement reagents for the HI702 Copper High Range CheckerHC. These high-quality reagents are manufactured in our...

Don’t worry about the subjectivity of color charts, trust our handheld colorimeter for accurate measurements for your water testing.  ...

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

Pinpoint ORP Redox 400 Calibration Fluid - 3 total packets