---
product_id: 1780644
title: "API LEAF ZONE Freshwater Aquarium Plant Fertilizer 18-Ounce Bottle White"
brand: "api"
price: "3904 kr"
currency: ISK
in_stock: true
reviews_count: 8
category: "Api"
url: https://www.desertcart.is/products/1780644-api-leaf-zone-freshwater-aquarium-plant-fertilizer-18-ounce-bottle
store_origin: IS
region: Iceland
---

# Chelated iron & potassium boost Rapid absorption formula Precise weekly dosing (5ml/10 gal) API LEAF ZONE Freshwater Aquarium Plant Fertilizer 18-Ounce Bottle White

**Brand:** api
**Price:** 3904 kr
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your aquarium’s green game — don’t let your plants miss out!

## Quick Answers

- **What is this?** API LEAF ZONE Freshwater Aquarium Plant Fertilizer 18-Ounce Bottle White by api
- **How much does it cost?** 3904 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/1780644-api-leaf-zone-freshwater-aquarium-plant-fertilizer-18-ounce-bottle)

## Best For

- api enthusiasts

## Why This Product

- Trusted api brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fish-Safe Formula:** Gentle enough for delicate freshwater fish and invertebrates
- • **Trusted Expertise:** Backed by 50+ years of API’s research-driven aquarium care innovation
- • **Long-Lasting Supply:** Generous 18-ounce bottle keeps your aquarium thriving for months
- • **Vibrant, Lush Growth:** Promotes strong, colorful leaves that stand out in any freshwater tank
- • **Fast-Acting Nutrients:** Formulated for rapid absorption to supercharge plant health weekly

## Overview

API LEAF ZONE Freshwater Aquarium Plant Fertilizer is a potent liquid formula designed to promote vibrant, healthy aquatic plants by delivering essential nutrients like chelated iron and potassium. Its rapid absorption supports photosynthesis and prevents leaf decay, while being safe for freshwater fish and invertebrates. With a convenient weekly dosing schedule and a large 18-ounce bottle, it’s a trusted solution for maintaining lush, colorful underwater landscapes.

## Description

Keep aquatic plants lush and vibrant with API LEAF ZONE Freshwater Aquarium Plant Fertilizer. API LEAF ZONE plant food for freshwater aquarium promotes strong, hardy, colorful leaves and prevent yellow, decaying leaves, using essential nutrients including chelated iron and potassium. This plant care solution promotes the lush, beautiful growth of aquatic plants. API LEAF ZONE is formulated for rapid absorption through plant leaves. This formula aids in photosynthesis and cell pressure maintenance. Use API LEAF ZONE plant food in freshwater aquariums containing freshwater fish and plants only. Dose your aquarium weekly with 5 ml of API LEAF ZONE per 10 US gallons of aquarium water. With API Aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your fish and aquarium. API Aquarium Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results.

Review: Working well for my Walstad-style aquariums, seems safe for fish - I have two planted aquariums I set up almost a year ago. I've been using less than the recommended dose of this fertilizer. I have cherry shrimp, pygmy corys, snails (mystery, Japanese trapdoor, ramshorn, bladder) and a betta fish, and none of them have shown distress from the fertilizer, even though the betta will get right under the dropper while I'm adding it to his tank. I wasn't using it in his tank for a while, but the valisneria started to die, and when I started fertilizing again (weakly weekly) it quickly started looking green and healthy. Other plants I have that are doing well include: anubius, bucephalandra, various cryptocorynes, salvinia, ludwigia, water wysteria, rotala, pearlweed, hairgrass, java moss. Also, this bottle is LARGE, and is going to take me years to get through.
Review: Great product - As pictured and delivered on time

## Features

- Contains one (1) API LEAF ZONE Freshwater Aquarium Plant Fertilizer 16-Ounce Bottle
- Promotes strong, hardy and colorful leaves and prevents yellow, decaying leaves
- Contains essential nutrients including chelated iron and potassium
- Formulated for rapid absorption in freshwater aquarium plants
- Dose your aquarium weekly with 5 ml of API LEAF ZONE per 10 US gallons of aquarium water

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #4,640 in Pet Supplies ( See Top 100 in Pet Supplies ) #24 in Aquarium Water Treatments |
| Brand | API |
| Customer Reviews | 4.6 out of 5 stars 7,829 Reviews |
| Global Trade Identification Number | 00317163105764 |
| Item Form | Liquid |
| Item Weight | 544.31 Grams |
| Liquid Volume | 0.5 Liters |
| Specific Uses For Product | Plant Growth |

## Product Details

- **Brand:** API
- **Item Weight:** 544.31 Grams
- **Item Form:** Liquid
- **Liquid Volume:** 0.5 Liters
- **Specific Uses For Product:** Plant Growth

## Images

![API LEAF ZONE Freshwater Aquarium Plant Fertilizer 18-Ounce Bottle White - Image 1](https://m.media-amazon.com/images/I/71WaB0EH-PL.jpg)

## Available Options

This product comes in different **Pattern, Size** options.

## Questions & Answers

**Q: Is this product safe for fish**
A: Yes. I get a great return on my aquatic plants and doesn't hurt the fish. Been using it now for a few years. Fyi..... my Angels are breeding and giving off healthy broods.

**Q: Does this product have copper in it?**
A: There is a very small amount. Small amounts like in this product are still safe from snails, shrimp, ect. If copper is at the bottom of the list it’s safe, you want to watch out for when Cooper it towards the top of the list

**Q: I am new at keeping live plants in fact I am waiting on my first order. I purchsaed this plant food but was also told I needed Flourish Excel, the ingredients are organic carbon. Are the these the same thing, ( plant food) ?  and do I need to use both at the same time? Thank you!**
A: I have found the following to be helpful. If you are comfortable with the API products you will also want to order API co2 booster. Every four months I also insert into the soil  API plant food.  I used these two products for the past year with my planted tanks.  I currently have three planted tanks. All are flourishing and doing great.

**Q: Will this work with an under gravel filter system?**
A: Yes , it works with undergravel filtration systems.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Working well for my Walstad-style aquariums, seems safe for fish
*by A***S on June 18, 2025*

I have two planted aquariums I set up almost a year ago. I've been using less than the recommended dose of this fertilizer. I have cherry shrimp, pygmy corys, snails (mystery, Japanese trapdoor, ramshorn, bladder) and a betta fish, and none of them have shown distress from the fertilizer, even though the betta will get right under the dropper while I'm adding it to his tank. I wasn't using it in his tank for a while, but the valisneria started to die, and when I started fertilizing again (weakly weekly) it quickly started looking green and healthy. Other plants I have that are doing well include: anubius, bucephalandra, various cryptocorynes, salvinia, ludwigia, water wysteria, rotala, pearlweed, hairgrass, java moss. Also, this bottle is LARGE, and is going to take me years to get through.

### ⭐⭐⭐⭐⭐ Great product
*by J***D on November 22, 2025*

As pictured and delivered on time

### ⭐⭐⭐⭐⭐ A picture says a thousand words...
*by A***Y on July 23, 2024*

I was using another product that was twice the price and it ran out and I switched to my Leaf Zone as a backup at the time. I am noticing just as good or even better growth using Leaf Zone for several months now for half the price. I have mainly S. Repens and Dwarf Sag. Different plants, different needs, different outcomes. I inject CO2 so don't let the pictures fool you, but I had cut way back on dosing some time back, and my plants almost died. I did it to see just how important ferts were and it almost cost me my whole setup. I dose every time I can closer to when my light turns on for maximum uptake. Sometimes I dose several days in row, sometimes I go 3 to 4 days without it. I noticed my algae levels go down as well btw, maybe because it's not as strong. For the price, it is hard to beat as long as it fits your needs.

## Frequently Bought Together

- API LEAF ZONE Freshwater Aquarium Plant Fertilizer 18-Ounce Bottle White
- API ROOT TABS Freshwater Aquarium Plant Fertilizer 0.4-Ounce 10-Count Box
- API Co2 Booster Freshwater Aquarium Plant Treatment 16 oz Bottle, Brown

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-01-24*