API Leaf Zone Freshwater Aquarium Plant Fertilizer, slide 1 of 1

API Leaf Zone Freshwater Aquarium Plant Fertilizer

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Keep your aquatic greenery lush and vibrant with API Leaf Zone. Just like any other plant on land, aquatic greens need a little boost to grow and stay healthy. This plant fertilizer contains chelated iron and potassium, which are essential to the health of leafy plants. It's also formulated for rapid absorption through leaves, giving them the help they need—fast. Just add 5 ml per 10 gallons of aquarium water and use once a month to nourish roots, stems and leaves.

Key Benefits
  • Promotes lush, beautiful growth of aquatic plants and greens.
  • Contains iron to help plant growth and prevent yellow, decaying leaves.
  • Contains potassium, which aids in photosynthesis and cell pressure maintenance for strong, hardy, colorful leaves.
  • For use in aquariums containing freshwater fish and plants.
  • Formulated for rapid absorption through plant leaves.

For use in aquariums containing freshwater fish and plants.

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  • Item Number
  • Aquarium Type
  • Fish Type
    Tropical Freshwater, Goldfish, Cichlid, Betta, Bottom Feeder

Use the API Dosing Cap on the Bottle. Add 5 mL per 10 gallons of aquarium water. Dose weekly.


Is API LEAF ZONE plant fertilizer safe to use with freshwater invertebrates such as shrimp?

Yes, API LEAF ZONE is safe to use with all freshwater invertebrates, such as shrimp or snails.

Do you need to remove your fish when API LEAF ZONE is applied to your tank?

API LEAF ZONE is safe to use in tanks with fish.

What is the prescribed amount of API LEAF ZONE per gallon?

It’s recommended to add 5 mil per 10 gallons of aquarium water weekly.

Does API LEAF ZONE promote/stimulate algae growth?

While API LEAF ZONE does stimulate algae growth, smaller amounts are less likely to result in an algae bloom.

Fish Care Made Easier

API is a name you can trust when it comes to taking care of fish. Not only are they passionate about fishkeeping, but they're dedicated to improving the hobby and making it easier to maintain the ideal aquatic environment. From helping the novice set up a new tank to providing state-of-the-art filters for advanced systems, you can rely on API's dedication to quality.

Fish Care Made Easier
Maintain the Perfect Setup

Maintain the Perfect Setup

Fishkeeping is a much easier task with API, because they've taken all the guesswork out of setting up a tank and maintaining it. Their proven treatments include water conditioners and clarifiers, fish medications, pH adjusters, algaecides and quick-start solutions—all designed to keep your aquarium crystal clear and your fish happy and healthy.

Testing Is Key

Once you've started a new aquarium, the only way to keep it in perfect balance is with routine water testing. API gives you all the tools you need to create a nurturing environment for both fish and live plants. Their comprehensive Master Test Kits are tailored to freshwater, saltwater or reef environments, and individual tests for things like pH, ammonia or nitrites leave nothing up to chance.

Testing Is Key
Clearing the Water

Clearing the Water

API offers reliable three-step filtration for tanks of all sizes with their FILSTAR XP Canister filters and wide variety of filter media. These powerful filters constantly circulate the water, trapping organic waste and odors, removing harmful ammonia and contaminants, and helping good bacteria to thrive in the tank.

Superior Nutrition

Feeding your aquarium inhabitants, whether they're tropical fish, turtles or newts, is something that can be tricky without the right food. API developed a special diet for every type of fish—one that's highly palatable, which leads to less waste in the tank. And that means less ammonia to cloud the water. For your turtle friends, premium floating pellets and stick treats provide multiple vitamins for a stronger, healthier shell.

Superior Nutrition
About API

About API

Through extensive and continuous research and development, API created quality products for all levels of fishkeeping. As people who are passionate about fish care, they understand the rewards of keeping up a successful aquarium or aquarium. With easy-to-read guides and premium treatments, foods, filters and testing equipment, API helps aquarists establish and maintain an environment where fish can flourish.

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Rating: 4.5 of 5 stars 12 Reviews 12 Reviews 4.6 out of 5 Stars

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Rating: 4.5 of 5 stars 4.6 / 5

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12 Reviews

Showing 1-10 of 12 Reviews

  • 5 out of 5 stars

    Love the Brand

    By Faithleach on Jan 18, 2021

    You can't go wrong with API, do some research on how to properly use it and it's worth every penny.

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  • 4 out of 5 stars

    Easy to use and seems safe for shrimp.

    By Demeter on Jun 29, 2020 top1000Contributor

    I bought this along with 3 Seachem products to really give my plants a boost. I was only using the 3 Seachem (Trace, Advance, Flourish) in my planted tanks and then my shrimp tank started having molting issues. I stopped the Seachem and switched to Leaf Zone and so far so good! All plants are doing well.

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  • 4 out of 5 stars

    Worked for me

    By Naki on Feb 27, 2020

    I had a Java plant that was rapidly declining and when I started using this it helped. I wouldn't say that it's helping very much, it's not all that my plant needs, but it stopped it from dying so I'm happy with it.

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  • 4 out of 5 stars

    I'm going to assume it worked

    By penjamin on Aug 19, 2019

    I can't keep plants alive On land or in water So I'm just going to assume this worked I killed an Anubis And bamboo!

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  • 5 out of 5 stars

    Don't waste your money!!!!

    By RipOff on Feb 7, 2019

    This product only has 2 ingredients and are minimal to what your plants really need. If you think this stuff is working on your plants your wrong, it’s your fish poop that’s doing all the work. Do your plants a favor and buy Seachem flourish and your plants will thank you.

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  • 5 out of 5 stars

    This is a great plant fertilizer

    By CSayger on Mar 5, 2019

    This is a great product, I've used it for years for my planted tank. It fertilizes the plants but doesn't cause algae growth.

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  • 5 out of 5 stars

    Makes Plants Grow FAST!

    By chloelane on Nov 3, 2018

    This stuff WORKS! I have a 5 gallon low-tech heavily planted nano aquarium. With no CO2 and a pretty basic full spectrum light, my plants flourish thanks to API Leaf Zone. I add it once a week and literally the next day my anubias and banana plant sprout a new leaf. Would highly recommend.

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  • 4 out of 5 stars

    It seems to do what it says

    By Moondancers on Aug 1, 2018 top50Contributor

    I will know more in a few months after using this product more but so far it seems to be working. Does not seem to tint the water like other products I have used. I love the easy measure cap, it makes it easy to get the perfect amount each time you use the product. I currently use this once a week. Does not seem to affect the water levels or the fish.

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  • 5 out of 5 stars

    plants love it

    By Awesome on Jul 20, 2018

    my plants are already looking better after one use

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  • 5 out of 5 stars

    Really helps with plant growth

    By Mufy on Oct 6, 2017

    I got this product 1-2 weeks ago and already some plants that were pretty much stagnant in my 30 gal pond (Pickerdilly weed, anubias, taro, other things from nature) started showing some growth. The pickerdilly has shot up 2 stems, the taro's new leaves are dark purple, my watercress is showing new growth. The anacharis is kind of crapping out though- read that this product may have adverse effects on it. I'm using this in combo with Seachem Flourish Excel, which is probably doing a part in the new growth too!

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