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December 2, 2025
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  Search results for Testing & Controllers*
83 Items . . .   392 News & Articles . . . Sort By  # List on Page
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Product Name
Category/Manufacturer
Item#
Hydrometer / Thermometer
AquaLife Hydrometer/Thermometer

-Measures gravity and temperature of saltwater aquariums

The AquaLife glass combination hydrome (read more . . .)
Catgeory Testing & Controllers*
Mfg Aquarium Life Support Systems Log in to see price   •NEW•   AL301
Refractometer Calibration Standard 35 ppt/ 1.0264 specific gravity 2 oz
Make sure your refractometer is giving you accurate readings. High range formula, best for primarily salt water applications. This calibration (read more . . .)
Catgeory Testing & Controllers*
Mfg Aquarium Life Support Systems Log in to see price   •NEW•   AL218
HI70300L Electrode Storage Solution 500ml Bottle
HI70300L
pH Electrode Storage Solution (500 mL)
HI70300L is an electrode storage solution prepared with reagent grade chemicals that can (read more . . .)
Catgeory Testing & Controllers*
Mfg Hanna Instruments Log in to see price   •NEW•   HN121
Refractometer Calibration Standard 0 ppt 2 oz
Make sure your refractometer is giving you accurate readings. Low range formula, best for primarily fresh water applications. This calibration (read more . . .)
Catgeory Testing & Controllers*
Mfg Aquarium Life Support Systems Log in to see price   •NEW•   AL217
aquavitro Sentia Doser Secondary Dosing Pump
The Sentia Dose Modular Aquarium Doser incorporates a host of fresh features built on the solid foundation of a peristaltic pump. Connect unlimi (read more . . .)
Catgeory Testing & Controllers*
Mfg Seachem Log in to see price •SALE•   SC163
Apex Double Junction Lab Grade ORP Probe
PRBORPDJ Double Junction ORP Probe

Neptune Double Junction probes will out last most other traditional lab grade probes letting you go l (read more . . .)
Catgeory Testing & Controllers*
Mfg Neptune Systems Log in to see price   NE120
Apex PM2 (Conductivity/Salinity, Temperature) I/O Expansion
Features of the Neptune Systems Salinity Expansion Module:
Monitor/Control Conductivity/Salinity and temperature
4 Measurement ranges (0- (read more . . .)
Catgeory Testing & Controllers*
Mfg Neptune Systems Log in to see price   NE106
Apex PM3 (Dissolved Oxygen, Temperature) I/O Expansion
With so many additives that are hitting the market today, that focus on biological nutrient removal can easily and rapidly take up the dissolved (read more . . .)
Catgeory Testing & Controllers*
Mfg Neptune Systems Log in to see price   NE107
Apex Conductivity Calibration Solution 53.0mS
COND53 53 mS/cm Conductivity Calibration Solution

53.0 mS Conductivity Solution - Used for calibrating conductivity probe for saltwater (read more . . .)
Catgeory Testing & Controllers*
Mfg Neptune Systems Log in to see price   NE124
Ammonia Alert
Ammonia Alert is an innovative color device for continuously detecting and monitoring toxic free ammonia. A sensor changes reversibly from yellow (read more . . .)
Catgeory Testing & Controllers*
Mfg Seachem Log in to see price   SC6626
Reef Master Test Kit
As a reef keeper, you already know how important water testing is to your thriving aquarium. But you are ready for more sensitive species that r (read more . . .)
Catgeory Testing & Controllers*
Mfg API Mars Fishcare Log in to see price   APH1030
Apex VDM Variable Speed Dimming -Module AI-Sol AcanLighting Compatible
The versatile VDM Expansion Module can be used as an LED Dimming module to simulate Sunrise/Sunset, Lunar Cycle, Clouds and Lighting with Apex Re (read more . . .)
Catgeory Testing & Controllers*
Mfg Neptune Systems Log in to see price   NE112
Apex LSM Lunar Simulator Module (no LEDs)
Add the Lunar Simulator Module Apex Unit to create a true lunar cycle to your reef aquarium. Many fish and corals will spawn following the lunar (read more . . .)
Catgeory Testing & Controllers*
Mfg Neptune Systems Log in to see price   NE113
Natural Scoop 4oz
Excellent for measuring powders, liquids, or pellets.

Measures 25ml to 125 ml, and shows milliliters, ounces, and cups.

Measu (read more . . .)
Catgeory Testing & Controllers*
Mfg Aquarium Life Support Systems Log in to see price   MK101
Digital pH Pen pH Meter pH600AQ  
DIGITAL. SIMPLE. COMPACT.

Over 200,000 people have relied on the Milwaukee pH600AQ compact pH pen tester to move from difficult to use a (read more . . .)
Catgeory Testing & Controllers*
Mfg Milwaukee Log in to see price   MIL2001
Calcium (Ca) Test Kit 0.5oz 15ml
This test monitors the calcium level easily and precisely in steps of 20 mg/l (ppm). For approx. 7,500 mg (ppm) calcium. Add sera marin COMPONENT (read more . . .)
Catgeory Testing & Controllers*
Mfg Sera Log in to see price   SER252
Magnesium (Mg) Test Kit 0.5oz 15ml
For monitoring magnesium levels in marine aquariums easily and safely. The magnesium level can be increased with sera marin COMPONENT 6 magnesium (read more . . .)
Catgeory Testing & Controllers*
Mfg Sera Log in to see price   SER253
Ammonia Test Kit
Maintaining good water quality is the key to successful fishkeeping.
Ammonia is the number one killer of both saltwater and freshwater fish. (read more . . .)
Catgeory Testing & Controllers*
Mfg API Mars Fishcare Log in to see price   APH7057
ORP Redox Probe
The MA921B/2M probe is designed for use with Milwaukee Monitors and Controllers.

DESIGN FEATURES

The Milwaukee Double Junction (read more . . .)
Catgeory Testing & Controllers*
Mfg Milwaukee Log in to see price   MIL2002
Carbonate Hardness/General Hardness (KH/GH) Test Kit
The general hardness (GH) and carbonate hardness (KH) of aquarium water should match that of the natural habitat of the fish. Otherwise, fish wi (read more . . .)
Catgeory Testing & Controllers*
Mfg API Mars Fishcare Log in to see price   APH7076
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