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Aquarium Pharmaceuticals (API)

A range of Medicines, Cures, Water Treatments & Additives from Aquarium Pharmaceuticals


API White Spot Cure

API White Spot Cure
Aquarium Pharmaceuticals API White Spot Cure:

Treats White Spot Disease in Freshwater Fish

API White Spot Cure works quickly to rid tropical and coldwater fish of white spot disease (Ichtyophthirius), a highly contagious parasitic disease

Use at the first sign of white spot

118ml treats up to 447 litres of fresh water

Add  API White Spot Cure 118ml    £5.99



Yet Another Great New Patented Breakthrough From Aquarium Pharmaceuticals

All-Natural PimaFix

  • Treats fungal infections
  • Treats both internal and external bacterial infections
  • PimaFix has been formulated to work in combination with MelaFix to enhance effectiveness against fish diseases
PimaFix is a natural botanical remedy made from Pimenta racemosa (West Indian Bay) oil, providing unique active compounds, which harmoniously work together to attack fish diseases. The active compounds found in Pimenta racemosa not only provide many different modes of action, but also eliminate the possibility of the development of resistant strains of disease-causing organisms. Until now, most antifungal medications resulted in unsightly water discoloration throughout the course of therapy.

PimaFix does not have this disadvantage, providing better viewing of fish during treatment. Treating with PimaFix will not harm the biological filter in freshwater or saltwater aquariums or ponds. PimaFix has no effect on pH. PimaFix is harmless to aquatic plants.

In extreme cases of especially stubborn infections, PimaFix has been designed to work synergistically with MelaFix. Using PimaFix and MelaFix together provides the added benefit of quick tissue regeneration and wound healing.

PimaFix Directions for Use

Shake well before each use.

For best results remove activated carbon during treatment.

As a disease treatment: Add 1 tsp for every 10 gallons (40L) of aquarium water.
Repeat dose daily for 7 days. Treatment may be continued, if necessary.

* Whenever treating with any medication, we suggest performing a 25-50% water change every three days depending on the organic load in water.

Add  API Pimafix 118ml    £8.15
Add  API Pimafix 237ml    £12.99



Great New Patented Breakthrough From Aquarium Pharmaceuticals

MelaFix uses the antibacterial power of Melaleuca (a species of Tea Tree) for the treatment of bacterial infections in fresh and saltwater fish. The healing properties of tea tree have been known for centuries.

Now, Aquarium Pharmaceuticals makes it available to you for treating aquarium fish.

Antibacterial Remedy, rapidly repairs damaged fins, heals open wounds and ulcers, stops mouth fungus, treats fin and tail rot. Safe for reef aquariums and live plants.

Will not adversely affect the biological filter, alter the pH, or discolour water.

Safe for invertebrates, reef aquariums and live plants.

For use in freshwater. Although safe to use in marine aquariums, Melafix® Marine is recommended in these cases.

Melafix® has been formulated to work in combination with Pimafix™ to enhance effectiveness against fish diseases.

Available in four sizes:

118ml treats 893 litres

237ml treats 1,794 litres

473ml treats 3,581 litres

1.9l Pro treats 72,010 litres

Add  API MelaFix 118ml    £8.99
Add  API MelaFix 473ml    £19.99
Add  API MelaFix 237ml    £11.75
Add  API MelaFix 1.9 Litre    £84.65

Accu - Clear

Accu - Clear
Quickly clears cloudy aquarium water, eliminating clouds caused by dirt, algae, or bacterial bloom.

Clumps together tiny floating particles, forming large debris to be removed by the aquarium filter.

Size Treats in Liters US. Gallons
37ml 1400 370
118ml 4467 1180
Add  API Accu-Clear 37ml    £4.69
Add  API Accu-Clear 118ml    £7.69




A patented water conditioner that works instantly, in both fresh and saltwater, to detoxify ammonia and remove chlorine and chloramines. Locks up ammonia in a non-toxic form until it can be broken down by the tank's natural biological filter. Eliminates fish stress and promotes healthy gill function.

  • Works instantly, in fresh or saltwater, to detoxify ammonia, remove chlorine and break the chloramine bond. Eliminates stress and protects healthy gill function.
  • Locks up ammonia in a non-toxic form
  • Effectiveness and safety proven by university laboratory studies
Size Treats in Liters Treats in US. Gallons
30ml 227 60
60ml 454 120
118ml 908 240
237ml 1794 474
473ml 3581 946
Please Note : API have now removed all references to Ammo Lock 2 : as they now only produce this and it is just called Ammo Lock

Add  API Ammo-Lock 118ml    £7.25
Add  API Ammo-Lock 237ml    £10.49
Add  API Ammo-Lock 473ml    £14.79

API Tap Water Conditioner

API Tap Water Conditioner
API Tap Water Conditioner : Aquarium Dechlorinator

Removes Chlorine and Breaks the Chloromine bond

API Tap Water Conditioner works instantly to detoxify heavy metals, remove chlorine and break the chloromine bond

Use whenever setting up an aquarium, changing water or adding water to the aquarium

Heavy metals such as copper, lead and zinc can be found in most tap water supplies. These metals are toxic to tropical fish, therefore it is important that tap water be treated before adding it to an aquarium

Directions for use :

To remove chlorine and detoxify heavy metals : use 1 drop per 3.8 litres

To detoxify chloromines : use 3 drops per 3.8 litres


118ml treats : up to 8,934 litres of fresh or salt water.
473ml treats : up to 35,810 litres of fresh or salt water.

Add  API Tap Water Conditioner 118 ml    £5.75
Add  API Tap Water Conditioner 473ml    £14.29

Stress Coat

Stress Coat
Aquarium Water Conditioner

With the healing power of Aloe Vera

Replaces the natural protective slime coating fish need in time of stress.

Removes Chlorine and neutralises Chloromines

Removes heavy metals

Use Whenever :

  • Setting up an aquarium
  • Adding or handling fish
  • Changing water
  • Fish are damaged by injury or disease
Size Treats in Litres US. Gallons
30ml 227 60
118ml 896 236
237ml 1794 474
473ml 3581 946
473ml + pump 3634 960


30ml treats : up to 227 Litres.
118ml treats : up to 896 Litres.
237ml treats : up to 1794 Litres.
473ml treats : up to 3581 Litres.
473ml + Pump treats : up to 3634 Litres.

Add  API Stress Coat 30ml    £2.05
Add  API Stress Coat 118ml    £6.49
Add  API Stress Coat 237ml     £9.79
Add  API Stress Coat 473ml     £16.99
Add  API Stress Coat 1.9 Litre    £21.05

Eco Strontium Marine

Eco Strontium Marine
Eco Strontium Marine : Essential Reef Supplement

Natural source of strontium.

Derived from marine plant extracts.

Unique, slow release formula replaces strontium depleted by natural marine aquarium processes.

Contains molybdenum and other essential elements. For a vibrant, healthy reef aquarium.

Use in reef aquariums containing hard corals, coralline algae, tubeworms, starfish and other invertebrates.

Treats :

473ml treats 3,588 litres of salt water


Stress Zyme

Stress Zyme
API Stress Zyme - Biological Filtration Booster

Why Use Stress Zyme?

It has been proven that regular use of Stress Zyme improves and accelerates the development of the biological filter, helps keep a naturally balanced aquarium, and helps maintain a cleaner aquarium.

Use of API Stress Zyme helps to rebuild bacterial flora after medical treatment.

How Does Stress Zyme Work?

API Stress Zyme contains over 345 million live bacteria per spoonful. The live bacteria contained in API Stress Zyme breaks down organic compounds that cause dangerous conditions such as ammonia and Nitrite poisoning and low oxygen levels.

Advantages Of Using Stress Zyme:

  • Active biological filter.
  • Better water quality.
  • Cleaner aquarium.
  • Healthier fish.
Directions For Use:

Recommended for use when setting up and maintaining a fresh or salt water aquarium.

Size Treats in Litres Treats in US. Gallons
30ml 227 60
118ml 893 236
237ml 1794 474
473ml 3634 960
1.9liter 14536 3840

For Fresh or Salt Water Aquariums

Sorry : but the 1.9 litre bottle has now been discontinued by the manufacturer

Add  API Stress Zyme 30ml    £3.25
Add  API Stress Zyme 118ml    £7.99
Add  API Stress Zyme 237ml    £10.49
Add  API Stress Zyme 473ml    £19.39
Add  API Stress Zyme 473ml + Free API Nitrite & Nitrate Test Strips    £19.39
Add  API Stress Zyme 1 US Gallon    £118.35

API Ammo-Chips

API Ammo-Chips

API Ammo-Chips

An economical and rechargeable ammonia remover great in freshwater aquariums and ponds.

Promotes a healthy environment in aquariums and goldfish bowls

Removes ammonia

Fully rechargeable

Add  API Ammo-Chips 340g    £4.50

API Aquarium Salt

API Aquarium Salt
All natural salt, made from evaporated sea water, promotes healthy gill function, reduces stress and loss of electrolytes.

Used to improve the efficiency of medications and reduce the harmful effects of nitrite.

Aquarium Salt can be used with tropical fish, goldfish and koi. Aquarium Salt will not change pH.

Aquarium Salt should not be used as a substitute for marine aquarium salt.

Size Treats in Liters Treats in US. Gallons
454g 404 101
933g 832 208

Directions for use:

General tonic and stress reducer: add one rounded tablespoonful for every 5 gallons (18.9 L) of aquarium water.

Tropical fish treatment or with a remedy: add one rounded tablespoonful for every 5 gallons (18.9 L) of aquarium water. Water temperature of 80°F (26°C) during treatment is recommended.

To hatch brine shrimp eggs: add eight tablespoonful for each gallon (3.78 L) of water.

Goldfish bowls: add ½ teaspoonful per gallon (3.78 L) of water.

Add  API Aquarium Salt 454g (16oz)    £3.99
Add  API Aquarium Salt 936g (33oz)    £5.99
Add  API Aquarium Salt (65oz)     £9.99

API Prevent Algae Phos Zorb Pouch

API Prevent Algae Phos Zorb Pouch
API Prevent Algae - Prevents algae growth in freshwater & saltwater

API Prevent Algae Phos Zorb is a specialized filtration medium in a convenient pouch that eliminates cloudy water caused by phosphate silicate.

API Prevent Algae Phos Zorb removes these common nutrients and enhances the growth of hard and soft corals on saltwater. Phos Zorb also removes compounds that inhibit plant growth in freshwater aquariums.

Directions for use:

Place pouch inside filter. Replace every 2 months or sooner if aquarium is heavily stocked and/or algae are detected.

Size Volume Treats in Litres Treats in Gallons
5 82ml 75 20
6 225ml 210 55
Add  API Prevent Algae Phos Zorb Pouch Size 6    £18.35

API Water Softener Pillow Pouch

API Water Softener Pillow Pouch
For Freshwater Aquariums Only

API Water Softener Pillow is scientifically proven to reduce GH (general hardness) by lowering calcium and magnesium. Also removes heavy metal ions, including copper and iron and also reduces white, crusty mineral deposits on aquarium surfaces.

API Water Softener Pillow can be reused after it is recharged in a salt solution.

When To Use:

Use API Water Softener Pillow when starting or maintaining an aquarium when testing indicates water hardness above the desired level.

Directions For Use:

Rinse pouch under tap water. Place pouch in path of water flow in the aquarium filter. Activity of the pillow lasts 48 hours. After 48 hours recharging is necessary.

To Recharge:

Dissolve 3 tablespoons of API Aquarium Salt in 7oz. of tap water. Rinse pouch in tap water, then soak in salt solution for 2 hours. Place back in filter, no need to rinse. When not in use, store the pouch in recharging solution; DO NOT let pillow dry out. Replace when Water Softener Pillow ceases to function properly after recharging.

1 small pouch treats up to 75 litres


API Electro Right

API Electro Right

Adds mineral elements and electrolytes to deionized or reverse osmosis water for proper gill function.

Raises GH (general hardness).

Specially formulated for use with freshwater tropical fish.


API Leaf Zone

API Leaf Zone
Promotes the healthy growth of aquatic plants.

  • : Liquid fertilizer formulated for rapid absorption by plant leaves.
  • : Contains chelated iron and potassium essential for lush green leaves.
  • : Contains no phosphate or nitrate.
Size Treats in Litres Treats in US. Gallons
240ml 1817 470
480ml 3634 940
Add  API Leaf Zone 237 ml    £8.89
Add  API Leaf Zone 473 ml    £13.79