JBL ProAquaTest KH Carbonate Hardness, Refill

Water test

€ 5,99

(Price shown includes 20% VAT. - Excludes delivery costs)

Variant: Refill

In stock

Delivery by Tuesday, 16 July if you order by Monday at 00:00.

Free shipping to Austria from € 49,90.
More information regarding shipping & delivery

Features & Advantages

  • Easy and safe control of the water values of aquariums
  • Determines the optimum carbonate hardness in freshwater and saltwater aquariums, as well as ponds
  • Colour change test: Add reagents drop by drop to the water sample
  • Detailed information on water analysis on the JBL Homepage
  • Child-safe reagent bottles
  • Application period for new furnishings: Once a day, then weekly

Item no.: JBL-2411100, Content: 1 set, EAN: 4014162241115


The JBL ProAqua Test KH is a water test for analyzing the optimal carbonate hardness in freshwater and seawater aquariums, as well as in ponds.

Depending on the origin of water, e.g. due to the nature of the substrate, different levels of different mineral salts, carbonates and carbon dioxide (CO2) form an important buffer system that prevents dangerously high pH fluctuations in the water. The measured carbonate hardness (KH) gives the total concentration of bicarbonate in the water and therefore may in rare cases (when mainly alkali bicarbonates are present, such as in East African lakes) be higher than the total hardness when considering only alkaline earth salts. Most freshwater fish and plants in the aquarium can be maintained successfully with a carbonate hardness of about 5-16 ° dH. However, for optimum CO2 fertilization, the carbonate hardness should not be below 5 ° dH. In the case of CO2 deficiency, aquatic plants or algae consume hydrogen carbonate (bio-decalcification) due to their rapid assimilation during photosynthesis and can thus dangerously raise the pH value for fish (over 10).

Recommended KH values:
Freshwater aquariums (community pool): 5-12 ° dKH
Malawi Lake Tanganyika Aquarium: 7-20 ° dKH
Plant aquariums with few fish (aquascaping): 3-8 ° dKH
Marine aquariums: 7-10 ° dKH
Ponds: 7-10 ° dKH

Our expert Oliver Knott recommends:
The carbonate hardness is crucial for the buffer capacity in the water and affects the pH value - a regular check is therefore essential!

Brands (Manufacturers): JBL
Hazard and precautionary statements

Signal word: Danger

Precautionary statements:

  • P101 - If medical advice is needed, have product container or label at hand.
  • P102 - Keep out of reach of children.
  • P303+P361+P353 - IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower].
  • P305+P351+P338 - IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P501 - Dispose of contents/container according to local/national regulations.

Hazard statements:

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

Customer Reviews

1 English review written for JBL ProAquaTest KH

6 customer reviews in all languages

5,0 out of 5 stars
5 stars
15 (100%)
4 stars
0 (0%)
3 stars
0 (0%)
2 stars
0 (0%)
1 Stars
0 (0%)

15 reviews
1 customer review in English
6 customer reviews in all languages

Related products

  • placeholder
  • placeholder
  • placeholder
  • placeholder

Customers also bought

  • placeholder
  • placeholder
  • placeholder
  • placeholder