Reagent solutions for the analysis of alkalinity, calcium, and magnesium levels.  Available in two, four, and five months supply packs.* ...

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

Control any pump via variable speed INPUT. Unlike other controllers that require intricate programming on pumps connected via 0-10V, the...

Designed to bring simplicity to salinity testing during the any process, the HI98319 Marine Salinity Tester measures conductivity (EC) to...

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

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

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

Reagent solutions for the analysis of alkalinity, calcium, and magnesium levels.  Available in two, four, and five months supply packs.* ...

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

Single-Use 35 PPT Seawater Reference For precise calibration of refractometers, hydrometers, and salinity/conductivity equipment, CoralVue Salinity Reference Solution is highly...

Lab Grade Salinity/Conductivity Probe Kit Keep track of the salinity in your marine aquarium with the CoralVues HYDROS Salinity Kit....

Our Marine Magnesium Checker HC (HI783) is designed to accurately and quickly determine the magnesium level in marine (saltwater) samples....

The HI784-25 includes the three replacement reagents needed for the Marine Ammonia Checker HC - HI784. These high-quality reagents are...

This HYDROS Drive Port Cable (72 inches long) is designed to connect to an available Drive port on a Kraken,...

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

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

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

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

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

Optical sensors are the go to sensor if you want a reliable sensor over a long period. The Neptune Optical...

Neptune Systems recommends keeping on hand no more Trident reagent than you might expect to consume within the next 12...

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

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

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

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

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

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

Six Pack of Reef ICP Water Tests The Fauna Marin Reef ICP Test (6 Pack) gives a quick and easy...

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

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

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

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...

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

pH Value @25C 10.01 Size 20 mL sachet HI70010P is a premium quality pH 10.01 calibration buffer produced in accordance...

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

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

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

Salifert Potassium Reef TestPotassium concentration in natural seawater is approximately 400 ppm. Many aquarists have reported that a low potassium...

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

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

A Great Start in Aquatic Monitoring and Control  The HYDROS Start is the perfect first aquarium controller, expertly designed to...

Never before offered in the aquarium industry the LLS Sensors allow for the measurement of water depth in inches or...

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

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

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

Sybon Heavy Duty Model is one of the most robust models available. You can feel the difference in weight by...

Easier to use and more accurate than chemical test kits Adaptation of Standard Method Ascorbic Acid Accuracy 10 ppb 5%...