Skip to content
Moving Sale! Up to 35% off thousands of items.
Moving Sale! Up to 35% off thousands of items.

API - Making a better underwater world


Filters

$
$

API Stress Coat+ Water Conditioner

Original price $14.95 - Original price $119.95
Original price $14.95 - Original price $119.95
Original price $14.95
$12.70 - $101.95
$12.70 - $101.95
Current price $12.70
2 in stock.

API® STRESS COAT water conditioner makes tap water safe for fish by removing chlorine, chloramines and heavy metals from tap water, and contains th...

View full details
Original price $14.95 - Original price $119.95
Original price $14.95 - Original price $119.95
Original price $14.95
$12.70 - $101.95
$12.70 - $101.95
Current price $12.70
Save up to 15% Save %

API Freshwater Master Test Kit

Original price $79.00
Original price $79.00 - Original price $79.00
Original price $79.00
Current price $67.15
$67.15 - $67.15
Current price $67.15
Out of stock

The API® Freshwater Master Test Kit measures the 4 most important levels in freshwater aquariums quickly and accurately, including pH, high range p...

View full details
Original price $79.00
Original price $79.00 - Original price $79.00
Original price $79.00
Current price $67.15
$67.15 - $67.15
Current price $67.15
Sold out

API Tap Water Conditioner

Original price $10.95 - Original price $129.00
Original price $10.95 - Original price $129.00
Original price $10.95
$9.30 - $109.65
$9.30 - $109.65
Current price $9.30
3 in stock.

Tap water contains chemicals and toxins that are harmful to fish if left untreated. API® Tap Water Conditioner removes these toxins instantly, so y...

View full details
Original price $10.95 - Original price $129.00
Original price $10.95 - Original price $129.00
Original price $10.95
$9.30 - $109.65
$9.30 - $109.65
Current price $9.30
Save up to 15% Save %

API Melafix Natural Antibacterial Fish Remedy

Original price $19.95 - Original price $38.95
Original price $19.95 - Original price $38.95
Original price $19.95
$16.95 - $33.10
$16.95 - $33.10
Current price $16.95
2 in stock.

MELAFIX® All natural treatment and protection of bacterial infections Benefits: Reduces risk of disease All natural antibacterial treatment Heals...

View full details
Original price $19.95 - Original price $38.95
Original price $19.95 - Original price $38.95
Original price $19.95
$16.95 - $33.10
$16.95 - $33.10
Current price $16.95
Save up to 15% Save %

API Aquarium Salt

Original price $9.95 - Original price $26.95
Original price $9.95 - Original price $26.95
Original price $9.95
$8.45 - $22.90
$8.45 - $22.90
Current price $8.45
4 in stock.

API® Aquarium Salt, made from evaporated sea salt, is a must-have for your aquarium! Aquarium salt promotes fish health by improving gill function,...

View full details
Original price $9.95 - Original price $26.95
Original price $9.95 - Original price $26.95
Original price $9.95
$8.45 - $22.90
$8.45 - $22.90
Current price $8.45
Save up to 15% Save %

API Stress Zyme Bacterial Cleaner

Original price $14.95 - Original price $179.00
Original price $14.95 - Original price $179.00
Original price $14.95
$12.70 - $152.15
$12.70 - $152.15
Current price $12.70
3 in stock.

API® STRESS ZYME bacterial cleaner contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keepi...

View full details
Original price $14.95 - Original price $179.00
Original price $14.95 - Original price $179.00
Original price $14.95
$12.70 - $152.15
$12.70 - $152.15
Current price $12.70
Save up to 15% Save %

API Algaefix

Original price $18.95 - Original price $28.95
Original price $18.95 - Original price $28.95
Original price $18.95
$16.10 - $24.60
$16.10 - $24.60
Current price $16.10
Out of stock

A revolutionary product specially developed to control many types of algae in freshwater aquariums containing live plants and fish to control green...

View full details
Original price $18.95 - Original price $28.95
Original price $18.95 - Original price $28.95
Original price $18.95
$16.10 - $24.60
$16.10 - $24.60
Current price $16.10
Sold out

API Quick Start

Original price $24.95 - Original price $99.95
Original price $24.95 - Original price $99.95
Original price $24.95
$21.20 - $84.95
$21.20 - $84.95
Current price $21.20
6 in stock.

API® QUICK START nitrifying bacteria allows for the instant addition of fish, as it immediately starts the natural aquarium cycle with beneficial b...

View full details
Original price $24.95 - Original price $99.95
Original price $24.95 - Original price $99.95
Original price $24.95
$21.20 - $84.95
$21.20 - $84.95
Current price $21.20
Save up to 15% Save %

API Pimafix Natural Antifungal Fish Remedy

Original price $19.95 - Original price $38.95
Original price $19.95 - Original price $38.95
Original price $19.95
$16.95 - $33.10
$16.95 - $33.10
Current price $16.95
3 in stock.

PimaFix Treats cotton-like fungal infections, and both internal and external bacterial infections. PimaFix harnesses the unique antifungal and anti...

View full details
Original price $19.95 - Original price $38.95
Original price $19.95 - Original price $38.95
Original price $19.95
$16.95 - $33.10
$16.95 - $33.10
Current price $16.95
Save up to 15% Save %

API Algae Eater Wafers

Original price $8.95 - Original price $28.95
Original price $8.95 - Original price $28.95
Original price $8.95
$7.60 - $24.60
$7.60 - $24.60
Current price $7.60
2 in stock.

ALGAE EATER WAFERS contains a rich blend of algae plus Omega-3 fatty acids to help promote healthy growth and development. Also includes alfalfa, a...

View full details
Original price $8.95 - Original price $28.95
Original price $8.95 - Original price $28.95
Original price $8.95
$7.60 - $24.60
$7.60 - $24.60
Current price $7.60
Save up to 15% Save %

API Bottom Feeder Pellets with Squid

Original price $10.95 - Original price $28.95
Original price $10.95 - Original price $28.95
Original price $10.95
$9.30 - $24.60
$9.30 - $24.60
Current price $9.30
2 in stock.

API® BOTTOM FEEDER PELLETS WITH SQUID are highly-palatable, nutrient-rich food, which is also supplemented with seaweed to help promote healthy gro...

View full details
Original price $10.95 - Original price $28.95
Original price $10.95 - Original price $28.95
Original price $10.95
$9.30 - $24.60
$9.30 - $24.60
Current price $9.30
Save up to 15% Save %

API Goldfish Aquarium Cleaner 118ml

Original price $10.95
Original price $10.95 - Original price $10.95
Original price $10.95
Current price $9.30
$9.30 - $9.30
Current price $9.30
Out of stock

API® Goldfish Aquarium Cleaner makes cleaning your Goldfish tank simple and easy! This product helps keep gravel clean and removes organic sludge, ...

View full details
Original price $10.95
Original price $10.95 - Original price $10.95
Original price $10.95
Current price $9.30
$9.30 - $9.30
Current price $9.30
Sold out

API Pond Algaefix

Original price $27.95 - Original price $119.00
Original price $27.95 - Original price $119.00
Original price $27.95
$23.75 - $101.15
$23.75 - $101.15
Current price $23.75
1 in stock.

API® Pond AlgaeFix® controls many types of green or green water algae, string or hair algae, and blanketweed in ponds with live plants. This powerf...

View full details
Original price $27.95 - Original price $119.00
Original price $27.95 - Original price $119.00
Original price $27.95
$23.75 - $101.15
$23.75 - $101.15
Current price $23.75
Save up to 15% Save %

API CO2 Booster

Original price $24.95 - Original price $43.95
Original price $24.95 - Original price $43.95
Original price $24.95
$21.20 - $37.35
$21.20 - $37.35
Current price $21.20
2 in stock.

Carbon deficiency is one of the leading causes of poor plant growth in aquariums. API® CO2 Booster adds essential liquid carbon for planted aquariu...

View full details
Original price $24.95 - Original price $43.95
Original price $24.95 - Original price $43.95
Original price $24.95
$21.20 - $37.35
$21.20 - $37.35
Current price $21.20
Save up to 15% Save %

API Quick Testing Strips 5 in 1

Original price $32.95 - Original price $79.95
Original price $32.95 - Original price $79.95
Original price $32.95
$28.00 - $67.95
$28.00 - $67.95
Current price $28.00
Out of stock

API® 5-in-1 Aquarium Test Strips are the quick and easy way to test the 5 most important water parameters – pH, KH, GH, nitrate, and nitrite – in o...

View full details
Original price $32.95 - Original price $79.95
Original price $32.95 - Original price $79.95
Original price $32.95
$28.00 - $67.95
$28.00 - $67.95
Current price $28.00
Sold out

API Aqua Essential Water Conditioner

Original price $12.95 - Original price $34.95
Original price $12.95 - Original price $34.95
Original price $12.95
$11.00 - $29.70
$11.00 - $29.70
Current price $11.00
17 in stock.

AQUA ESSENTIAL water conditioner is a highly concentrated all-in-one water conditioner that instantly makes tap water safe for fish by removing chl...

View full details
Original price $12.95 - Original price $34.95
Original price $12.95 - Original price $34.95
Original price $12.95
$11.00 - $29.70
$11.00 - $29.70
Current price $11.00
Save up to 15% Save %

API BettaFix Remedy 50ml

Original price $14.95
Original price $14.95 - Original price $14.95
Original price $14.95
Current price $12.70
$12.70 - $12.70
Current price $12.70
6 in stock.

All natural antibacterial medication for Bettas. For use on wounds, ulcers, mouth fungus and fin and tail rot. Use whenever Bettas exhibit signs of...

View full details
Original price $14.95
Original price $14.95 - Original price $14.95
Original price $14.95
Current price $12.70
$12.70 - $12.70
Current price $12.70
Save 15% Save %

API Leaf Zone

Original price $17.95 - Original price $26.95
Original price $17.95 - Original price $26.95
Original price $17.95
$15.25 - $22.90
$15.25 - $22.90
Current price $15.25
1 in stock.

API® Leaf Zone contains iron & potassium for colorful leaves and a vibrant planted aquarium. Product is formulated for rapid absorption through...

View full details
Original price $17.95 - Original price $26.95
Original price $17.95 - Original price $26.95
Original price $17.95
$15.25 - $22.90
$15.25 - $22.90
Current price $15.25
Save up to 15% Save %

API Test Kit General & Carbonate Hardness GH/KH

Original price $29.95
Original price $29.95 - Original price $29.95
Original price $29.95
Current price $25.45
$25.45 - $25.45
Current price $25.45
Out of stock

When keeping freshwater fish and plants, the general hardness (GH) and carbonate hardness (KH) of aquarium water should match their natural habitat...

View full details
Original price $29.95
Original price $29.95 - Original price $29.95
Original price $29.95
Current price $25.45
$25.45 - $25.45
Current price $25.45
Sold out

API Ammo Lock

Original price $14.95 - Original price $33.95
Original price $14.95 - Original price $33.95
Original price $14.95
$12.70 - $28.85
$12.70 - $28.85
Current price $12.70
1 in stock.

API® Ammo Lock is scientifically proven to protect fish against harmful ammonia by converting poisonous ammonia into a non-toxic form. Ammo Lock wo...

View full details
Original price $14.95 - Original price $33.95
Original price $14.95 - Original price $33.95
Original price $14.95
$12.70 - $28.85
$12.70 - $28.85
Current price $12.70
Save up to 15% Save %

API Betta Food Pellets 22g

Original price $8.95
Original price $8.95 - Original price $8.95
Original price $8.95
Current price $7.60
$7.60 - $7.60
Current price $7.60
Out of stock

BETTA FOOD is scientifically formulated to enhance the vibrant colors of Bettas. Floating pellet for all Betta fish Release up to 30% Less Ammonia...

View full details
Original price $8.95
Original price $8.95 - Original price $8.95
Original price $8.95
Current price $7.60
$7.60 - $7.60
Current price $7.60
Sold out

API Root Tabs 10 Pack

Original price $25.95
Original price $25.95 - Original price $25.95
Original price $25.95
Current price $22.05
$22.05 - $22.05
Current price $22.05
Out of stock

A superior plant fertilizer in tablet form.  Contains key essential nutrients to stimulate lush plant growth.  Gets new plants off to a good start ...

View full details
Original price $25.95
Original price $25.95 - Original price $25.95
Original price $25.95
Current price $22.05
$22.05 - $22.05
Current price $22.05
Sold out

API Glass Test Tube with Cap

Original price $2.95 - Original price $69.95
Original price $2.95 - Original price $69.95
Original price $2.95
$2.50 - $59.45
$2.50 - $59.45
Current price $2.50
1 in stock.

API® TEST TUBES are compatible with any aquarium or pond water test kits and are perfect for testing more water parameters at one time. Option of o...

View full details
Original price $2.95 - Original price $69.95
Original price $2.95 - Original price $69.95
Original price $2.95
$2.50 - $59.45
$2.50 - $59.45
Current price $2.50
Save up to 15% Save %

API Accu-Clear Water Clarifier

Original price $14.95 - Original price $26.95
Original price $14.95 - Original price $26.95
Original price $14.95
$12.70 - $22.90
$12.70 - $22.90
Current price $12.70
1 in stock.

API® Accu-Clear quickly clarifies cloudy water in your aquarium, eliminating haze to make your water crystal clear. API Accu-Clear clumps tiny floa...

View full details
Original price $14.95 - Original price $26.95
Original price $14.95 - Original price $26.95
Original price $14.95
$12.70 - $22.90
$12.70 - $22.90
Current price $12.70
Save up to 15% Save %