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Aquarium Supplies

Fish Additives & Supplements

We carry a wide variety of additives produced by the most respected companies serving the aquarium hobby, such as Kent Marine, E.S.V., Seachem and Two Little Fishies. 2-part Calcium and Alkalinity Supplements are popular additives among reef keepers since calcium and alkalinity tend to deplete quickly in a reef aquarium.
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Aquarium Pharmaceuticals® API Tap Water Conditioner (4 oz.)

Aquarium Pharmaceuticals® API Tap Water Conditioner (4 oz.)

Let's face it, the health of your aquarium system centers almost solely on the health of your aquarium's water. Unhealthy water equals stressed out and, eventually, diseased fish and sick plants. Of course, the most common way to ...

$6.40
Aquarium Pharmaceuticals® API Ammo-Lock

Aquarium Pharmaceuticals® API Ammo-Lock

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 biolog...

From $8.26
Aquarium Pharmaceuticals® API Stress Coat Marine

Aquarium Pharmaceuticals® API Stress Coat Marine

Stress Coat Marine is a fish and tap water conditioner. It is the only marine water conditioner with the healing power of Aloe Vera. Developed for use with a protein skimmer as it will not cause foaming. Removes chlorine, chloram...

From $7.99
Aquarium Pharmaceuticals® API pH Up 16oz

Aquarium Pharmaceuticals® API pH Up 16oz

Freshwater fish need a certain pH level in order to be healthy. But there are naturally occurring substances that bring down the pH levels in aquariums such as acids and low KH levels (a.k.a. carbonate hardness). Use Aquarium Ph...

$10.99
Aquarium Pharmaceuticals® API Proper pH 7.5

Aquarium Pharmaceuticals® API Proper pH 7.5

Condition your aquarium or pond water regularly with the Aquarium Pharmaceuticals Proper Ph 7.5 from Pet Store . This formula enables you to adjust the pH level and stabilize it to the desired level. It also neutralizes harmful s...

$9.17
Aquarium Pharmaceuticals API Quick Start

Aquarium Pharmaceuticals API Quick Start

In a new aquarium, harmful ammonia and nitrite build up from fish waste, often resulting in fish loss. The unique, patented nitrifying bacteria in API Quick Start are scientifically proven to quickly consume ammonia and nitrite to...

From $8.99
Aquarium Pharmaceuticals® API Stress Zyme

Aquarium Pharmaceuticals® API Stress Zyme

Improves the development of the biological filter and helps clean a dirty aquarium. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite...

From $6.99
Aquarium Pharmaceuticals® API Stress Coat

Aquarium Pharmaceuticals® API Stress Coat

Instantly removes chlorine and chloramines, making tap water safe for fish. Neutralizes heavy metals. Also, replaces the natural slime coating fish need in times of stress, such as handling, shipping or fighting. Contains Aloe Ver...

From $6.99
Aquarium Pharmaceuticals® API Accu-Clear

Aquarium Pharmaceuticals® API Accu-Clear

Quickly clears cloudy aquarium water, eliminating clouds caused by dirt. Clumps tiny particles, causing them to fall to the bottom or collect in the filter. Makes any filter work more efficiently to create crystal-clear water fast...

From $5.99
Aquarium Pharmaceuticals® API pH Down 16oz

Aquarium Pharmaceuticals® API pH Down 16oz

Ensure the pH equilibrium within your fish home by giving it a daily dose of the Aquarium Pharmaceuticals pH Down from Pet Store . This formula comes in a sixteen-ounce bottle that is sufficient for use for several days. It is a ...

$10.99
Aquarium Pharmaceuticals® API Proper pH 8.2

Aquarium Pharmaceuticals® API Proper pH 8.2

Easy-to-use, fast dissolving powder that automatically sets and stabilizes pH at 8.2 while neutralizing chlorine and detoxifying heavy metals. For saltwater, brackish and African cichlid aquariums. Contains aloe vera and electroly...

$9.13
Aquarium Pharmaceuticals® API Stress Coat 4 Oz

Aquarium Pharmaceuticals® API Stress Coat 4 Oz

Acts as a liquid bandage to prevent the loss of essential electroytes; protects damaged tissue against disease-causing organisms. Helps heal torn fins & skin wounds. Use when setting up aquarium or changing water. Contains aloe ve...

$3.20
Aquarium Pharmaceuticals® API Proper pH 7.0 250g

Aquarium Pharmaceuticals® API Proper pH 7.0 250g

Automatically sets and stabilizes pH at 7.0. Removes chlorine & detoxifies heavy metals. For community aquariums. Contains Aloe Vera and electrolytes to reduce fish stress. Use when setting up aquarium or changing water. Purpose...

$9.25
Aquarium Pharmaceuticals® API Tap Water Conditioner 16oz

Aquarium Pharmaceuticals® API Tap Water Conditioner 16oz

Are you trying to put up a new marine environment? Make your first step by using the Aquarium Pharmaceuticals Tap Water Conditioner 16oz from Pet Store . This solution conditions tap water to make it ready and suitable for aquari...

$5.99
Aquarium Pharmaceuticals® API Tap Water Conditioner 1gal

Aquarium Pharmaceuticals® API Tap Water Conditioner 1gal

Are your fish getting sick and you can't figure out the cause? If your aquarium water looks clean enough to rule out algae or other organisms, maybe it's the water itself. If you are using tap water, use Aquarium Pharmaceuticals T...

$29.99
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