---
product_id: 31043710
title: "RTKA Potassium Test Kit"
brand: "salifert"
price: "€ 39.75"
currency: EUR
in_stock: true
reviews_count: 8
category: "Salifert"
url: https://www.desertcart.at/products/31043710-rtka-potassium-test-kit
store_origin: AT
region: Austria
---

# Fast results in minutes Up to 40 reliable tests Accurate 250-470 ppm range RTKA Potassium Test Kit

**Brand:** salifert
**Price:** € 39.75
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your reef glowing with precision and speed!

## Quick Answers

- **What is this?** RTKA Potassium Test Kit by salifert
- **How much does it cost?** € 39.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/31043710-rtka-potassium-test-kit)

## Best For

- salifert enthusiasts

## Why This Product

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

## Key Features

- • **Long-Lasting Value:** Perform up to 40 tests per kit—perfect for consistent monitoring without frequent repurchasing.
- • **Speed Meets Simplicity:** Get fast, easy-to-read results so you can spend less time testing and more time enjoying your aquarium.
- • **Dutch Quality Assurance:** Proudly made in Holland, combining trusted craftsmanship with cutting-edge aquatic science.
- • **Marine-Optimized Formula:** Specifically designed for marine environments to ensure your coral colors pop naturally.
- • **Precision at Your Fingertips:** Measure potassium levels with lab-grade accuracy to keep your reef vibrant and thriving.

## Overview

The RTKA Potassium Test Kit by Salifert offers fast, accurate potassium measurement from 250 to 470 ppm, tailored for marine aquariums. Each kit supports up to 40 tests, enabling consistent monitoring to maintain optimal coral coloration and health. Manufactured in Holland, this kit is a trusted choice among reef enthusiasts seeking reliable, easy-to-use water testing solutions.

## Description

Salifert Potassium Reef Test Potassium concentration in natural seawater is approximately 400 ppm. Many aquarists have reported that a low potassium value reduces colors in corals. This can be corrected by increasing the potassium value to the normal natural concentration. Now you can accurately measure this value with the new Salifert Potassium Reef Test kits.

Review: Very good 👍 - Very good 👍
Review: salifert is great - easy to use and accuracy is good enough for your reef tank

## Features

- Fast, easy, and accurate
- Measures potassium from concentrations of 250 ppm to 470 ppm
- Sufficient for up to 40 tests
- For marine use only
- Made in Holland

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0084CO4LC |
| Best Sellers Rank | #62,074 in Pet Supplies ( See Top 100 in Pet Supplies ) #96 in Aquarium Test Kits #584 in Aquarium Water Treatments |
| Brand | Salifert |
| Brand Name | Salifert |
| Customer Reviews | 4.2 out of 5 stars 128 Reviews |
| Global Trade Identification Number | 08714079150208 |
| Included Components | See packaging |
| Item Type Name | Potassium (K) Test Kit |
| Manufacturer | Royal Aquatic LLC |
| Model Number | RTKA |
| Number of Items | 1 |
| Part Number | RTKA |
| Recommended Uses For Product | Aquarium |
| Unit Count | 1 Count |

## Images

![RTKA Potassium Test Kit - Image 1](https://m.media-amazon.com/images/I/71BleRDgHNL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good 👍
*by V***� on December 6, 2025*

Very good 👍

### ⭐⭐⭐⭐⭐ salifert is great
*by A***R on April 6, 2024*

easy to use and accuracy is good enough for your reef tank

### ⭐⭐⭐⭐⭐ Conforme
*by E***C on January 15, 2026*

Todo bien

## Frequently Bought Together

- Salifert RTKA Potassium Test Kit
- Salifert Calcium (Ca) Test Kit - 50 to 100 Tests

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---

*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-07-08*