---
product_id: 1780644
title: "API LEAF ZONE Freshwater Aquarium Plant Fertilizer 18-Ounce Bottle White"
brand: "api"
price: "R468"
currency: ZAR
in_stock: true
reviews_count: 12
category: "Api"
url: https://www.desertcart.co.za/products/1780644-api-leaf-zone-freshwater-aquarium-plant-fertilizer-18-ounce-bottle
store_origin: ZA
region: South Africa
---

# rapid absorption formula 16 oz potent liquid fertilizer chelates iron & potassium API LEAF ZONE Freshwater Aquarium Plant Fertilizer 18-Ounce Bottle White

**Brand:** api
**Price:** R468
**Availability:** ✅ In Stock

## Summary

> 🌿 Transform your aquarium into a lush underwater oasis — 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?** R468 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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

- • **Lush, Vibrant Growth Every Week:** Dose just 5 ml per 10 gallons for thriving freshwater plants
- • **Scientifically Formulated for Speed:** Rapid absorption ensures nutrients hit leaves fast for instant vitality
- • **Trusted by Aquarists for Over 50 Years:** API’s research-driven innovation guarantees reliable, consistent results
- • **Essential Nutrients for Color & Strength:** Chelated iron and potassium prevent yellowing and decay
- • **Safe for Your Entire Freshwater Ecosystem:** Fish and shrimp-friendly formula keeps your tank balanced and healthy

## Overview

API LEAF ZONE is a 16-ounce liquid fertilizer designed specifically for freshwater aquarium plants. It delivers essential nutrients like chelated iron and potassium through a rapid absorption formula that promotes strong, colorful, and healthy leaves while preventing yellowing and decay. Safe for fish and invertebrates, this weekly dose fertilizer supports vibrant aquatic plant growth and has been trusted by aquarists for over five decades.

## 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: Great product - As pictured and delivered on time
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.

## 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 |
|---------------|-------|
| ASIN | B0002566TW |
| Best Sellers Rank | #4,421 in Pet Supplies ( See Top 100 in Pet Supplies ) #25 in Aquarium Water Treatments |
| Brand | API |
| Customer Reviews | 4.6 4.6 out of 5 stars (7,852) |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00317163105764 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 4.8 ounces |
| Item model number | 576J |
| Liquid Volume | 0.5 Liters |
| Manufacturer | Mars Fishcare |
| Number of Items | 1 |
| Product Dimensions | 1 x 1 x 6 inches |
| Specific Uses For Product | Plant Growth |
| UPC | 317163105764 019014705764 317163105672 |
| Unit Count | 16.0 Fluid Ounces |

## Product Details

- **Brand:** API
- **Item Form:** Liquid
- **Item Weight:** 4.8 ounces
- **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

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

As pictured and delivered on time

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ 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 South Africa*
*Store origin: ZA*
*Last updated: 2026-02-20*