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Description
JBL KH Test RefillSimple and reliable control of water values in aquariums and ponds. Determination of the optimal carbonate hardness for freshwater and saltwater Colour change test: Fill plastic cuvette with water sample, add reagent drop by drop until colour changes from blue to yellow. Number of drops = level of carbonate hardness When to use: when setting up a new aquarium: once a week Online Laboratory: regular control for a healthy aquarium pond with conditions
- Simple and reliable control of water values in aquariums and ponds. Determination of the optimal carbonate hardness for freshwater and saltwater
- Colour change test: Fill plastic cuvette with water sample, add reagent drop by drop until colour changes from blue to yellow. Number of drops = level of carbonate hardness
- When to use: when setting up a new aquarium: once a week
- Online Laboratory: regular control for a healthy aquarium/pond with conditions close to nature. JBL has water tests in the form of quick tests or colour change tests for every water analysis. Testing aquarium water for healthy, clear water
- Package contents: 1 quick test, KH Test. Incl. reagent and plastic vial. Refill reagent avaiable separately
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Really nice
Size: 10.5 Wide, Color: Black
My husband loves these shoes. He has a flat food and said they still fit nice.
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Reviewed in the United States on June 1, 2026
★★★★★ 4
Good Quality
Size: 11, Color: White
Nice looking shoe. Slides on easy. My only feedback would be I wish the toe box was a bit wider and the heel a bit higher. It's a good shoe overall. I would buy again.
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Reviewed in the United States on April 10, 2025
★★★★★ 5
Fit
Size: 11.5 Wide, Color: Cognac
Comfortable and affordable
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Reviewed in the United States on May 14, 2026
★★★★★ 3
Classy pair that look great but don’t last
Size: 12, Color: Black, Size: 12, Color: Black
Great shoe. Slip on is easy and the shoes are comfortable and classy.
Ten months later and the bottom has holes and didn’t last.
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Reviewed in the United States on March 30, 2025
★★★★★ 5
Love it
Size: 11, Color: Black
Almost the perfect travel shoe. Goes well with both casual and formal attire. Walked like a million steps with this in Japan, SEA, etc. only thing it probably can't do is probably hiking.
Otherwise the leather feels really high quality, and the shoe slips on without much fuss. I'd describe the style as: a dressed-up Converse
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Reviewed in the United States on March 22, 2026