API Aquarium Water Test Kit Range

API Aquarium Water Test Kit Range

The API Aquarium Water Test Kit Range provides reliable liquid testing for the key water parameters that affect fish, plants, corals and overall aquarium health. These kits are designed for easy at-home testing and are suitable for freshwater, saltwater or both, depending on the individual test.

Regular testing helps identify water quality problems early, making it easier to maintain stable conditions and avoid stress, algae problems or fish loss.

Available Test Kits

• Ammonia Test Kit – measures harmful ammonia in freshwater and saltwater aquariums
• Nitrite Test Kit – monitors nitrite during cycling and in established aquariums
• Nitrate Test Kit – helps track nitrate levels and overall water quality
• pH Test Kit – measures standard freshwater pH
• High Range pH Test Kit – designed for higher-pH systems such as marine, African cichlid and goldfish aquariums
• pH Test & Adjuster Kit – tests freshwater pH and includes pH Up and pH Down for adjustment
• GH & KH Test Kit – measures general hardness and carbonate hardness in freshwater aquariums
• KH Test Kit – measures carbonate hardness and buffering capacity
• Phosphate Test Kit – monitors phosphate levels in freshwater and saltwater systems
• Calcium Test Kit – measures calcium in saltwater and reef aquariums
• Copper Test Kit – monitors copper concentration during copper-based fish medication treatments

Ammonia Test Kit

The API Ammonia Test Kit measures ammonia levels in aquarium water and is suitable for both freshwater and saltwater systems.

Ammonia is highly toxic to fish and can rise quickly in new aquariums, overstocked tanks or systems with biological filtration problems.

• Up to 130 tests
• Tests ammonia NH₃ / NH₄⁺
• Suitable for freshwater and saltwater
• Ideal for new aquarium cycling and routine monitoring

Nitrite Test Kit

The API Nitrite Test Kit helps monitor nitrite, another toxic compound produced during the aquarium nitrogen cycle.

• Up to 180 tests
• Suitable for freshwater and saltwater
• Particularly useful when cycling new aquariums
• Helps identify biological filtration problems

Nitrate Test Kit

The API Nitrate Test Kit measures nitrate levels, helping aquarists determine when water changes or nutrient management may be required.

• Up to 90 tests
• Suitable for freshwater and saltwater
• Helps monitor long-term water quality
• Useful for controlling excess nutrients and algae growth

pH Test Kit

The API pH Test Kit provides accurate monitoring of standard freshwater pH levels.

• Up to 250 tests
• Measures approximately pH 6.0–7.6
• Ideal for tropical freshwater and community aquariums
• Helps maintain stable water conditions

High Range pH Test Kit

The API High Range pH Test Kit is designed for aquariums with naturally higher pH levels.

• Up to 160 tests
• Measures approximately pH 7.4–8.8
• Suitable for marine aquariums
• Ideal for African cichlids and other alkaline-water species

pH Test & Adjuster Kit

The API pH Test & Adjuster Kit combines pH testing with products to help adjust freshwater pH.

• Up to 250 tests
• Includes pH Up
• Includes pH Down
• Designed for freshwater aquariums
• Allows both monitoring and adjustment from one kit

GH & KH Test Kit

The API GH & KH Test Kit measures both general hardness and carbonate hardness.

GH indicates the concentration of dissolved minerals such as calcium and magnesium, while KH measures the aquarium's buffering capacity and resistance to sudden pH changes.

• Designed for freshwater aquariums
• Useful for planted tanks
• Helps match water conditions to specific fish species
• Important for maintaining stable pH

KH Test Kit

The API KH Test Kit measures carbonate hardness, helping determine how well the aquarium can resist sudden pH fluctuations.

• Suitable for freshwater and saltwater
• Helps monitor buffering capacity
• Particularly useful in marine, cichlid and planted systems
• Supports greater pH stability

Phosphate Test Kit

The API Phosphate Test Kit measures phosphate levels in freshwater and saltwater aquariums.

Excess phosphate can contribute to unwanted algae growth and may be important to monitor in reef systems.

• Up to 150 tests
• Suitable for freshwater and saltwater
• Helps identify excess nutrient levels
• Useful for planted, marine and reef aquariums

Calcium Test Kit

The API Calcium Test Kit measures calcium concentration in saltwater aquariums.

Calcium is especially important in reef systems where corals, crustaceans and other calcifying organisms require it for healthy skeletal and shell growth.

• Designed for saltwater aquariums
• Ideal for reef systems
• Helps maintain suitable calcium levels for corals and invertebrates

Copper Test Kit

The API Copper Test Kit is designed to monitor copper levels during treatment with copper-based fish medications.

• Up to 90 tests
• Suitable for freshwater and saltwater
• Helps maintain an effective treatment concentration
• Useful in quarantine and hospital aquariums

Easy Aquarium Water Testing

Each API liquid test kit is designed to provide clear colour-based results using a sample of aquarium water, test solution and colour chart.

Regular testing is particularly important:

• When cycling a new aquarium
• After adding new fish
• When fish show signs of stress
• After medication
• Following major water changes
• When algae problems develop
• When maintaining sensitive reef or planted systems

The API Aquarium Water Test Kit Range makes it easy to monitor individual water parameters and maintain a stable, healthy environment for freshwater, marine and reef aquarium livestock.