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...

Neptune Apex Temperature Probe Keeping a stable and consistent temperature in the aquarium is paramount to the health of your...

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

BLAST Into the Future of Aquarium Control  The HYDROS Launch is a multifaceted aquatic support system that combines various features...

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

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

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

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

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

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

The HI755-26 are the replacement reagents for the Marine Alkalinity Checker® HC - HI755 and Marine Alkalinity (dKH) Checker® HC...

Easier to use and more accurate than chemical test kits Adaptation of Standard Method 4500-P E Accuracy 4% 0.04 ppm...

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...

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

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

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

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

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

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

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

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

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

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...

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

NEW SmartTemp Thermometer. This unique design combines a thermometer with a magnet. The Thermometer goes on the inside of the...

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

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

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...

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

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

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.  ...

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

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

HYDROS Waterproof IP68 Temperature sensor - Sense Port Accessory The HYDROS Slim Temperature Sensor Probe is only 1.6” long and...

Optical Level Sensor  (OS-1) V2 This sensor plugs into your FMM and, using reflected infrared light, will signal your Apex...

Pinpoint ORP Redox 400 Calibration Fluid - 3 total packets

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 10.01 Size 20 mL sachet HI70010P is a premium quality pH 10.01 calibration buffer produced in accordance...

The ATI ICP-MS Premium Water Analysis is a laboratory water analysis of 50 parameters in a reef tank that provides...

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...

Pipette Set - 10ml, 5ml, 3ml (includes 1 of each size) Made of food-grade polyethylene. They work great for refractometer...