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Water Treatments & Test Kits

API 5 in 1 Test Strips
In order for fish to thrive, water conditions in the aquarium need to be the same or very similar to those found in nature.
API Accu-Clear 118ml
ACCU-CLEAR clarifies hazy aquarium water fast, eliminating clouding brought about by suspended particles.  The fast acting, ACCU-CLEAR clumps tiny floating particles together, forming large particles to be removed by the aquarium filter
API Ammo-Lock 118ml
If the aquarium tests positive for ammonia, act quickly by doing a partial water change and then neutralize the ammonia.
API Ammonia Test Strips
The quick and accurate way to test for the presence of ammonia. This kit reads 0-6 ppm of ammonia. Desiccant-lined tube, with snap-tight cap, provides maximum moisture protection for accurate results
API Aquarium Salt
AQUARIUM SALT supplies the electrolytes fish need to help them breathe easier and remain healthy in their new surroundings
API Aquarium Start Up Pack
It’s important to treat your water before adding fish.  This convenient kit contains Stress Coat and Quick Start to get your new aquarium started in 2 easy steps.
API High Range pH Test Kit
Use to measure pH changes in marine aquariums, aquariums with African cichlids, and very alkaline tap water. Reads the pH of water within the high range of 7.4 to 8.8. 160 tests per kit.
API Liquid Ammonia Test Kit
Quickly & accurately measures the level of ammonia in pond water, reading levels from 0 ppm to 8 ppm. Makes 130 tests.
API Liquid KH Test Kit
Tests tap water fresh or saltwater aquariums for carbonate hardness (KH). Can be used to determine the proper dose of pH buffers.
API Liquid Nitrite Test Kit
Quickly accurately measures the level of nitrite in pond water, reading levels from 0 ppm to 5 ppm. Makes 180 tests.
API Master Reef Test Kit
The REEF MASTER TEST KIT tests 4 key parameters to keep reef inhabitants healthy. The kit is highly accurate and economical
£26.24 £34.99
API Monthly Care
MONTHLY CARE contains 4 different aquarium treatments, each provided in single dose formats.   To maintain a healthy aquarium, it’s important to change the water and treat it monthly.
API Nitrate Test Kit
A high nitrate level indicates a build-up of fish waste and organic compounds, resulting in poor water quality and algae growth.
API pH Test and Adjuster Kit
A complete kit to measure and adjust pH. Tests pH levels from 6.0 to 7.6 and includes bottles of pH Up and pH Down to modify aquarium water pH to desired levels.
API pH Test Kit
Taking a few minutes each week to maintain and monitor aquarium conditions is the key to a healthy aquarium.   pH control is imperative to prevent the harmful effects of overly alkaline or acidic aquarium water on fish and plant life.
API Phosphate Test Kit
Phosphate can enter your aquarium through tap water, fish waste, and decaying organics such as uneaten food and dead algae.
API Prevent Algae
Reduces aquarium maintenance by removing phosphate which contributes to algae growth. Regular use prevents green water. Safe for all aquarium inhabitants including corals and inverts in marine/saltwater setups.
API Stress Zyme
STRESS ZYME adds beneficial bacteria to break down and consume organic matter to help keep the aquarium clean.  The bacteria in STRESS ZYME is uniquely suited to consume aquarium sludge, and keep the gravel clean.
Freshwater Master Test Kit
Taking a few minutes each week to maintain and monitor aquarium conditions is the key to a healthy aquarium.  The FRESHWATER MASTER TEST KIT tests the parameters that affect the health of freshwater fish: pH, High Range pH, Ammonia, Nitrite and Nitrate.
Goldfish Care Pack
Combines the water conditioning of Goldfish Protect and the cleaning power of Goldfish Aquarium Cleaner in a trial size pack.
Goldfish Protect
Makes tap water safe for Goldfish. Use when starting up and changing water. Removes chlorine and chloramines.
pH Up 118ml
Raises pH and makes aquariums more alkaline. Fast-acting, colourless and easy-to-use
Phos. Remover (Marine) 375g
Prevents Algae Growth Phosphate Remover permanently removes phosphate to help prevent unwanted algae growth in marine aquariums.
Prevent Algae Size 5 82ml
Prevent Algae is a filter material which removes the common nutrients phosphate and silicate from the water. For freshwater or marine aquariums.
£5.99 £7.99
Proper pH 8.2 Small
Automatically sets and stabilizes pH at 8.2. For saltwater, brackish and African cichlid aquariums. Use when setting up aquarium or changing water. No phosphates.
Quick Start
Start your aquarium immediately.  QUICK START allows for instant addition of fish as it immediately starts the natural aquarium cycle. 
Stress Coat
STRESS COAT makes tap water safe and contains the healing power of Aloe Vera, scientifically proven to reduce fish stress and heal damaged tissue. 
Supercarb (Marine) 250g
Supercarb removes organic molecules and colour taint, enhancing water clarity in marine aquariums. Can be used to remove residues of treatments from water.
Tap Water Conditioner
Spread throughout tap water are various chemicals and toxins that can be harmful to fish if left untreated. TAP WATER CONDITIONER removes these toxins instantly.
Tetra Balance Balls (250 Balls)
The unique, long-lasting filter media, Tetra Balance Balls, optimises and balances important water parameters in your aquarium. Nitrate is a nutrient for plants and algae alike, the aquarium's nitrate content should not exceed the amount which the plants can process otherwise the algae will begin to thrive and take over.
Tetra Crystal Water
For crystal clear aquarium water - Safely clears cloudy aquarium water
Tetra Easy Balance
EasyBalance® offers a number of benefits, including reduction of phosphate, stabilization of pH and KH, and replenishment of essential trace elements and minerals.
Tropical Fish Care Pack
API's best selling water conditioners in a convenient kit. Contains Stress Coat and Stress Zyme. Dose with Stress Coat to remove chlorine and neutralize chloramines and protect fish with the healing power of Aloe Vera.