Product Price Treatment Capacity (gal) Active Ingredients Chlorine Removal Speed (min) pH Adjustment Capability Ammonia Removal Nitrite Removal
TankFirst Complete Aquarium Water Conditioner
US
£12.54 1000

TankFirst Complete instantly makes tap water safe by removing chlorine and chloramines while temporarily detoxifying ammonia and nitrite. Its odor-free formula is suitable for freshwater, saltwater, reef, planted, and sensitive-fish aquariums.

★ Ideal for

It suits beginners because the 5 mL per 10 gallons dosing is simple, the formula tolerates slight overdosing, and it temporarily detoxifies ammonia and nitrite for up to 24 hours.

API Tap Water Conditioner 16 fl oz
US
£6.64 9460 sodium thiosulfate, EDTA tetrasodium salt instant

API Tap Water Conditioner is a highly concentrated dechlorinator that instantly removes chlorine, neutralizes chloramines, and detoxifies heavy metals. It is suitable for freshwater and saltwater aquariums, especially during setup and water changes.

★ Ideal for

This suits beginners because it works instantly, uses a simple dosing-cap method, treats 9460 gallons, and does not change aquarium pH.

Fritz Aquatics Fritz Complete Conditioner
US
£4.98 1200 Sodium formaldehyde sulfoxylate 0

Fritz Complete is a concentrated, one-step conditioner for freshwater and saltwater aquariums. It instantly removes chlorine and chloramine while detoxifying ammonia, nitrite, nitrate, and heavy metals, making it suitable for water changes, new setups, planted tanks, reef aquariums, and emergency ammonia or nitrite spikes.

★ Ideal for

It suits beginners because the concentrated 5 mL dose treats 50 gallons, works instantly, does not affect pH, and handles chlorine, chloramine, ammonia, and nitrite in one step.

API Stress Coat+
US
£553.72 312 Aloe Vera 0

API Stress Coat+ treats up to 312 gallons per 118 ml and instantly removes chlorine, chloramines, and heavy metals. Aloe Vera helps protect fish by replacing the slime coat and supporting healing, making it suitable for freshwater and saltwater aquariums.

★ Ideal for

It suits beginners because it works instantly, uses a simple 5 ml per 10 gallons dose, treats up to 312 gallons per 118 ml, and does not alter aquarium pH.

Kordon NovAqua+
US
£3.17 960 Electrolytes, inorganic salts, buffering system, reducing agents, synthetic polymers, vitamins, product stabilizers, edetates, organic herbal extracts 0-5

Kordon NovAqua+ is a concentrated aquarium water conditioner that treats chlorine, chloramines, heavy metals and iodine while adding electrolytes, vitamins and a protective slime coat. It suits freshwater and marine aquariums, including routine water changes and new tank setups.

★ Ideal for

It is beginner-friendly because the simple dose treats 960 gallons per 16 fl oz and works within seconds to a few minutes while stabilizing pH and conditioning tap water.

Fritz Aquatics Fritz Complete Conditioner 4 oz
US
£4.12 1200 Sodium formaldehyde sulfoxylate Instant

Fritz Complete is a concentrated, full-spectrum conditioner that instantly removes chlorine and chloramine while detoxifying ammonia, nitrite, nitrate, and heavy metals. It is suitable for freshwater, saltwater, reef, planted, and invertebrate aquariums, making it useful for beginners performing water changes or addressing ammonia and nitrite spikes.

★ Ideal for

This product suits beginners because its one-step formula works instantly, treats 1,200 gallons per 4 oz bottle, does not affect pH, and detoxifies both ammonia and nitrite.

Seachem Prime 500 mL SKU 232241
US
£13.78 5000

Seachem Prime is a highly concentrated conditioner for freshwater and saltwater aquariums. It removes chlorine and chloramine while detoxifying ammonia and nitrite, making it suitable for routine water changes and cycling emergencies.

★ Ideal for

This product suits beginners because its simple 5 mL per 50-gallon dose treats up to 5000 gallons and also detoxifies ammonia and nitrite without affecting pH.

Fritz Complete Water Conditioner 2 fl oz Model 235042731
US
£3.68 600 Sodium formaldehyde sulfoxylate

Fritz Complete is a concentrated, full-spectrum conditioner that removes chlorine and chloramine and detoxifies ammonia, nitrite, nitrate, and heavy metals. The 2 oz bottle treats up to 600 gallons and is suitable for freshwater, saltwater, reef, planted, fish, invertebrate, and coral aquariums.

★ Ideal for

This product suits beginners because its concentrated formula treats 600 gallons, works instantly, comes in a 2 oz bottle with a dropper cap for two drops per gallon, and handles chlorine, chloramine, ammonia, and nitrite without changing pH.

Seachem Prime
US
£10.62 1000

Seachem Prime is a concentrated water conditioner for freshwater and saltwater aquariums. It removes chlorine and chloramine while temporarily detoxifying ammonia, nitrite, nitrate, and typical tap-water heavy metals, making it suitable for routine water changes and aquarium cycling.

★ Ideal for

Prime suits beginners because one measured dose treats 50 US gallons and handles chlorine, chloramine, ammonia, and nitrite without changing pH.