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Ships within 48 hours ยท Estimated delivery Jul 16 - Jul 21
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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
4.8 โ
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Based on 7 reviews
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Product Reviews
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4
runs a bit small
Color: Ocean Blue, Size: Large
lightweight, comfortable. However, I needed to return and by one size larger. I wanted it it for a comfy - nighttime- like PJ's kind of fit.
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Reviewed in the United States on May 6, 2026
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5
Comfortable and Pretty
Color: Claret, Size: Small
Nice cut for a t-shirt and I love the color. Bought for a trip to Asia, it's soft and comfy. It dried overnight in 80% humidity after washing. I was looking for natural fibers that is quick drying.
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Reviewed in the United States on May 6, 2026
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5
Very nice
Color: Ocean Blue, Size: Medium
Soft breathable. Fit true to size. Washed nice
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Reviewed in the United States on March 28, 2026
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5
Good item
Color: Claret, Size: Medium
I really like it, nice fabric and comfortable
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Reviewed in the United States on April 21, 2026
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5
Super soft and comfortable!
I haven't bought new underwear in forever. I used to wear thongs, but now find them incredibly uncomfortable. The last few times I've tried to buy new underwear, the sizing was either way off (I'm a medium, but gave up after having to return them for a large and then extra large) or the quality was horrible (two brands stretch waaaay out and they can fall down while wearing them (I have larger ass-ets, so they shouldn't start to slide down during use). I tried these after buying some bamboo pyjamas and I love them! They are incredibly soft, comfortable, and stretchy. I can use them all day, and they work well, whether I'm lounging on the couch or wearing them under my spandex shorts at the gym, they don't ride up or slide down. They are both comfortable and look sexy, while providing support in all the right places. I haven't had them too long, so I can't speak on the durability, but they appear to be of good quality and I plan to order more, this time without the band.
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Reviewed in the United States on November 13, 2025
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