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   Home » Saltwater Aquarium Supplies » Testing Equipment » 173 items found
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Marine Depot Aquarium Refractometer


The Refractometer is a must have for all hobbyists. The proper salinity is crucial for the survival and health of your fish and corals. This high quality refractometer is extremely accurate and easy to use and calibrate. Calibrat...

Avg. Customer Review (30) reviews

Optical: See all items

Our Price: $49.99
Item Code: MD2101
American Marine Pinpoint pH Monitor


Protect your investment with American Marine Pinpoint Controllers & Monitors Using the most current technology and design, American Marine controllers and monitors have become the most respected line of digital instruments ...

Avg. Customer Review (14) reviews

Monitor Equipment: See all items

Our Price: $89.99
Item Code: AM1111
Aqua Medic Biotherm Temperature Controller/Monitor


Fluctuations in temperature cause changes to the water`s specific gravity, ability to hold oxygen and causes stress to fish, often leading to disease. A consistent temperature is a key element of stability, and stability is a cor...

Avg. Customer Review (15) reviews

Temperature Controllers: See all items

Our Price: $49.00
Item Code: AQ3131
Neptune Aquacontroller 3 (Backlight) w/ Temperature Probe


The AquaController III base unit contains all the necessary capabilities to monitor and control even the most demanding aquarium setup. All of the features described below are present in the base unit; there are no additional soft...

Avg. Customer Review (4) reviews

Monitor Equipment: See all items

Our Price: $299.99
Item Code: NS1181
Captive Purity Refractometer


The Captive Purity Refractometer is an incredibly accurate and easy to use device that eliminates the confusion associated with inexpensive hydrometers. Just place a couple of drops of water on the prism and hold to the light. Rea...

Avg. Customer Review (7) reviews

Optical: See all items

Our Price: $69.99
Item Code: CP2111
American Marine Pinpoint pH Monitor Package


American Marine PINPOINT pH Monitor The PINPOINT pH Monitor™ is in use by thousands of customers worldwide. This affordable unit remains the only full-time pH monitor with .01 resolution. The PINPOINT pH Monitor™ requires only a ...

Avg. Customer Review (9) reviews

Monitor Equipment: See all items

Our Price: $94.99
Item Code: AMPHMK
Portable pH Pen/Meter


This handy pH pen/meter is a great tool for any aquarist. It is extremely easy to use and is waterproof. Simply dip the meter in the solution to get the pH reading. Its high accuracy and resolution also make it suitable even for t...

Avg. Customer Review (3) reviews

Monitor Equipment: See all items

Our Price: $59.99
Item Code: CP2131
Captive Purity Refractometer with Calibration Dial


The Captive Purity Refractometer is an incredibly accurate and easy to use device that eliminates the confusion associated with inexpensive hydrometers. Just place a couple of drops of water on the prism and hold to the light. Rea...

Avg. Customer Review (9) reviews

Optical: See all items

Our Price: $89.99
Item Code: CP2113
American Marine Pinpoint pH Probe


PINPOINT ™ pH Replacement Probe is designed especially with your purpose in mind. It features long, continuous duty expectancy, fast response and, most importantly, is non-toxic to your system. Each probe features a 10 foot ca...

Avg. Customer Review (6) reviews

Replacement Probes: See all items

Our Price: $44.95
Item Code: AM1411
Coralife Digital Thermometer


Ideal for aquariums and terrariums. Readings in 0.1 degrees Fahrenheit or Celsius. Temperature range -10 degrees F to 140 degrees F (-23 degrees C to 60 degrees C). Mounting suction cups and battery included. 39 inch long temperat...

Avg. Customer Review (10) reviews

Thermometers: See all items

Our Price: $7.99
Item Code: ES00232
American Marine Pinpoint pH Calibration Fluid #7


American Marine PINPOINT High-Precision pH Calibration Fluids 7.000 +/- 0.002 (for 10+, $0.85 each) These come in single-use plastic envelope packets, and they are extremely accurate and field portable. Each packet contains enoug...

Avg. Customer Review (1) reviews

Calibration Solution: See all items

Our Price: $0.95
Item Code: AM1415
Captive Purity Refractometer with Light


The Captive Purity Refractometer is an incredibly accurate and easy to use device that eliminates the confusion associated with inexpensive hydrometers. Just place a couple of drops of water on the prism and hold to the light. Rea...

Avg. Customer Review (4) reviews

Optical: See all items

Our Price: $119.99
Item Code: CP2115
American Marine Pinpoint II Calcium Monitor


The PINPOINT II Calcium Monitor™ is the only truly affordable and accurate digital Calcium measurement instrument. Powered by a 9-volt battery (not included) or the Pinpoint AC Adapter Kit (not included). The PINPOINT II Calcium M...


Our Price: $249.99