Aquarium Test Kits
Accurate water testing is essential for maintaining a stable marine or reef aquarium. Our range of aquarium test kits and water-testing equipment helps you monitor everything from salinity and temperature to nitrate, phosphate, alkalinity, calcium and magnesium.
For more detailed analysis, we also offer professional ICP laboratory testing for trace elements, nutrients and potential pollutants.
Whether you're carrying out routine checks, managing coral supplementation or troubleshooting an aquarium problem, choose from trusted testing equipment for accurate, informed reef keeping.
You can browse our full range of aquarium test kits below:
Which Aquarium Test Kit Do I Need?
Regular testing helps you understand what is happening inside your aquarium and identify changes before they become larger problems. The parameters you need to monitor will depend on the type of aquarium you keep.
Temperature
Temperature is one of the simplest but most important aquarium parameters to monitor.
For straightforward everyday checking, an aquarium thermometer provides a quick visual indication that your heater, cooling equipment and aquarium are operating within the expected range.
BEST FOR: Every marine and reef aquarium.
Salinity
Stable salinity is fundamental to a marine aquarium.
For quick routine measurements using only a few drops of water, choose the Red Sea High-Accuracy Seawater Refractometer.
For high-precision analogue specific-gravity measurements, the Tropic Marin High-Precision Hydrometer & Measuring Cylinder Set offers a fine 0.0001 resolution without electronic or optical calibration.
BEST FOR: Every marine and reef aquarium.
Nitrate & Phosphate
Nitrate (NO₃) and phosphate (PO₄) are two key nutrients to monitor in marine and reef aquariums.
Red Sea Nitrate Pro provides high-accuracy nitrate testing, while Red Sea Phosphate Pro provides precise phosphate measurement.
Testing both together gives a much clearer picture of aquarium nutrient conditions and helps guide decisions around feeding, filtration, water changes and nutrient management.
BEST FOR: Routine nutrient monitoring and reef aquariums.
Alkalinity, Calcium & Magnesium
Coral aquariums – particularly systems containing growing LPS and SPS corals – require additional monitoring.
The Red Sea Foundation Pro Multi Test Kit combines high-accuracy tests for:
• Alkalinity / KH
• Calcium (Ca)
• Magnesium (Mg)
Regular testing helps establish how quickly these elements are being consumed and allows supplementation or dosing systems to be adjusted accordingly.
BEST FOR: Coral aquariums and reef keepers using supplementation or dosing pumps.
ICP Laboratory Testing
Want to look beyond the parameters normally measured at home?
Fauna Marin Reef ICP provides professional ICP-OES laboratory analysis of 37 water values, including major elements, trace elements and potential pollutants.
For a much more comprehensive investigation, Fauna Marin Reef ICP Total analyses over 90 measurement and relational values and also includes analysis of your RO water.
BEST FOR: Periodic reef analysis, trace-element monitoring and troubleshooting unexplained problems.
Make Titration Testing Easier
The AutoAqua Smart Stir continuously mixes your sample while reagents are added, making regular liquid and titration testing quicker and more convenient.
It is particularly useful alongside tests for alkalinity, calcium and magnesium.
Test, Understand, Then Adjust
Aquarium testing isn't simply about chasing a particular number.
Regular testing allows you to understand trends, recognise changes and make informed adjustments to feeding, filtration, water changes and supplementation.
For reef aquariums, stability and consistency are often just as important as the individual result.