---
product_id: 6666687
title: "Flourish Potassium, 2 L / 67.6 fl. oz."
brand: "seachem"
price: "€ 108.53"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.fr/products/6666687-flourish-potassium-2-l-67-6-fl-oz
store_origin: FR
region: France
---

# Fish Targeted 2L Volume 4.7 lbs Weight Flourish Potassium, 2 L / 67.6 fl. oz.

**Brand:** seachem
**Price:** € 108.53
**Availability:** ✅ In Stock

## Summary

> 🌿 Unleash the Power of Potassium!

## Quick Answers

- **What is this?** Flourish Potassium, 2 L / 67.6 fl. oz. by seachem
- **How much does it cost?** € 108.53 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/6666687-flourish-potassium-2-l-67-6-fl-oz)

## Best For

- seachem enthusiasts

## Why This Product

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

## Key Features

- • **Pure & Clean:** Free from phosphates and nitrates, ensuring a balanced ecosystem for your aquatic life.
- • **Perfect Pairing:** Designed to complement Flourish Nitrogen and Flourish Phosphorus for optimal results.
- • **Yam-Free Assurance:** Safe for all aquatic environments, catering to diverse fish species.
- • **Elevate Your Aquarium:** Highly concentrated formula with 50,000 mg/L of potassium for vibrant plant growth.
- • **Effortless Application:** Liquid form for easy dosing, making aquarium care a breeze.

## Overview

Flourish Potassium is a premium potassium supplement designed specifically for planted aquariums. With a potent concentration of 50,000 mg/L, it promotes lush plant growth while maintaining a phosphate and nitrate-free environment, making it the perfect addition to your aquatic ecosystem.

## Description

Flourish Potassium™ contains 50,000 mg/L of potassium suitable for the natural planted aquarium. Potassium is one of several elements that are vitally important to maintaining a vigorous level of growth in a planted aquarium. Potassium can become depleted in a rapidly growing system or when the source water has a low mineral content. In these cases potassium could become the limiting factor to growth. Use Flourish Potassium™ to prevent potassium depletion (signs of which include yellowing in older leaves) and maintain the highest level of growth. The most easily obtained sources of potassium are potassium nitrate and potassium phosphate. Both of these sources add to either nitrogen or phosphorus as well as potassium, making it virtually impossible to target a specific NPK ratio. Flourish Potassium™ is derived from potassium sulfate, allowing the user to adjust potassium levels without affecting nitrogen or phosphorus.

## Features

- Potassium supplement for the planted aquarium
- Highly concentrated (50,000 mg/L)
- Does not contain phosphate or nitrate making it ideal for use with Flourish Nitrogen and Flourish Phosphorus

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 4.7 Pounds |
| Liquid Volume | 2 Liters |
| Allergen Information | Yam Free |
| Target Species | Fish |
| Item Form | Liquid |

## Product Details

- **Brand:** Seachem
- **Liquid Volume:** 2 Liters
- **Item Weight:** 1.93 Kilograms
- **Item Form:** Liquid
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Flourish Potassium, 2 L / 67.6 fl. oz. - Image 1](https://m.media-amazon.com/images/I/51H+kGOCL0L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great, little goes a long way, effective
*by P***O on July 20, 2016*

I use a little less than half recommended bottle dosage every day of all seachem ferts (rotate days between trace and flourish complete). Also use online co2 calculator and use just below dose of co2 tank from 5 am to 5pm. Then I air stone at night. Slightly underused recommended fish food once or twice a day. I take no days off. 2/3rd water change and vacuum every 10 days. Perfect numbers and very slow minimal acceptable algae growth on walls to be hardly visibly noticeable. I created my own HOB power filter and pre-filter using a number of materials from amazon sources. I only clean the sponges and not the physical media, squeeze them out in the throw out water that comes out during water change. Aquarium maintenance 101 from a newbie. Use as little substrate as possible to keep plants alive to more easily avoid snails. Clean literally everything before putting into aquarium, better for it to die before going in aquarium than to introduce snails. Scrape the walls of algae at each waterchange.If you get snails, take literally everything out but fish and inverts, and soak it in a low ratio bleach plus water bath for like 20 minutes, this is the only way to kill all pest snails literally. Drain the water to just enough for the fish and inverts to swim and live, then scrub the entire aquarium with a scraper and take out literally anything you can see. Scrape again 3 times. Wipe it all down and make sure all there is you can see is the fish and inverts and clear water. Then wipe again.Add plenty of cycling bacteria from multiple sources you can find on amazon including seachem. Refill the aquarium with the bleach soaked plants decorations subtrate and filter medias. MAKE SURE YOU SOAK IN PLENTY OF DECHLORINATOR AND WATER FOR 20 MINUTES first. None of your plants should die off completely but they will lose and have killed a good amount of their leaves and roots but they should survive and regrow if you fert and change new water and quick cycle with added bacteriaI truly hope this helps. My first year with a fully stocked nano tank has been a lot of time reading and experimenting. The pest snail battle was epic but I've been free for 6 months completely. I win. Oh and didn't lose a fish or invert and plants are beyond original growth. This is with having done zero quarantining or adapting at any point. I also cycled from day one, no precycling.Use a 24 hour light with cycling phases and full K spectrum for plants. It is way easier and effective and worth the minor price increase over standard lights. And it is funAlso add Indian leaves and a UV filterFilter floss = crystal clear water. Chemical filtration is entirely unnecessaryHave had no issues and made zero adjustments in six months everything has been clear and clean, green growth strong, living things have thrived.Electric heater w built in temperature control at 82 degrees for tropical fish and plants

### ⭐⭐⭐⭐⭐ Concentrated, will last you months depending on tank size
*by L***E on April 9, 2025*

Great! VERY concentrated, warning: don't overdose constantly! It'll give you hair algae problems lol! great for extra supplementing live plants! don't smell it also.

### ⭐⭐⭐⭐⭐ Very powerful product for all planted aquariums
*by J***E on August 6, 2015*

Seachem products are very helpful and essential to planted fish tanks for a variety of reasons. If you are just beginning to venture into a live planted aquarium, these are great products to dose. With that being said, you do have to use caution to not over do it. If you are researching this product, let me tell you why and how they work to help you make up your mind:1. Using the proper doses of seachem products together help your plants grow firm, tall, and gain the beautiful glow they need.2. Natural algae block!!! A common problem in planted aquariums is algae. Proper dosage of these products provide your plants with nutrients that are designed to be readily absorbed by your plants before algae can get it. Plants and algae compete in the aquarium for nutrients and proper use of seachem products will give your plants a jump start to suck up the nutrients before algae will get to it and grow.3. Plants are a great natural filter for your aquarium and if you have fish that breed, the rapid growth will allow your fish great coverage and hiding areas to either lay eggs or have their babies.The list goes on and on about why these products do work well, but you have to remember to get everything together for a good planted aquarium to work. Seachem is wonderful enough to provide dosing regimens on their website. I successfully used it as a guide and tweaked it to what my plants needed.

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-02-28*