Your cart is empty.

JBL Carbonate Hardness Test

JBL Carbonate Hardness Test

  • Quick drop test for determining carbonate hardness
  • Colour change test, i.e. you count the drops of reagent you add
  • Colour change from blue to yellow
In stock
Free shipping on orders over € 50.- within Germany Change region
Express delivery possible
1-3 business days - order today and we’ll deliver next week on Tuesday at the earliest
I want to order to 

Please choose a variant

We’re here for you!

Limited telephone support at the moment.

Due to the current Corona situation, we are unfortunately not able to offer full telephone support, as many employees had to move to their home office.

You can still reach us via e-mail and we will be happy to help you!

We kindly ask for your understanding in view of the current situation. Take care of yourself and stay healthy!


Item question

We’re here for you!

Please enter your question and e-mail and we’ll contact you as soon as possible. It usually takes us up to 24 hours during business days to respond.

Thank you for your question!

Thank you, we’ll get in touch!

Close window

You already sent us a question.

Please wait a few minutes


The JBL KH test set is an easy-to-use quick test for determining the carbonate hardness, or rather, the acid binding capacity in fresh and marine water.


  • Colour change from blue to yellow
  • The number of used drops = level of carbonate hardness
  • For this reason this test does NOT require a color scale
  • Includes syringe for simple measurement of the amount of water

Product safety

safety information in accordance with GHS


Signal word: Danger

  • H226 Flammable liquid and vapour.
  • H314 Causes severe skin burns and eye damage.
  • H318 Causes serious eye damage.



JBL is a German company with a long tradition and a vast product range for aquarium enthusiasts. From high-quality fish and shrimp food over external filters to aquatic plant fertilisers - JBL offers an enormous choice for every aquarium keeper.

The research and development department of JBL constantly brings new innovative products onto the market. No matter whether you are an aquascaper, fish keeper, shrimp keeper or planted tank enthusiast, JBL offers suitable tools and accessories for all of these aspects of the hobby in order to support aquarium enthusiasts with the set-up and maintenance of their tanks.

General information

Please choose a variant to see more information.

Item no.
Shipping weight

Customer reviews

This item has been rated 4.9 out of 5 stars
7 Reviews
Please sign in if you want to write a review. Sign in
5 Stars(6)
4 Stars(1)
3 Stars(0)
2 Stars(0)
1 Star(0)
pedro u.
great item
28th February 2020
JBL - Carbonate Hardness Test - Refill
JBL - Carbonate Hardness Test - Refill

todo perfecto, test para saber tu kh, rapido y facil

all perfect!! is perfect to know your kh, easy and quick test

Regina J.
Bin voll zufrieden
15th June 2016
JBL - Carbonate Hardness Test - Refill
JBL - Carbonate Hardness Test - Refill

Leicht anzuwenden und gut ablesbar. Bis jetzt hat der Test mich noch nie enttäuscht und mir anscheinend auch gute Ergebnisse geliefert.

Simone K.
Absolut empfehlenswert ...
20th April 2016
JBL - Carbonate Hardness Test - Test kit
JBL - Carbonate Hardness Test - Test kit

Preis-Leistungsverhältnis top, Qualität prima, und sieht auch noch gut aus. Schneller Versand und professionelle Verpackung - Aquasabi eben. (read more)

View all reviews