API Hardness Test Kit GH/KH Freshwater

Marsoni

M251S

$32.00

Get it in 3 business days with 1 day shipping. Friday, May 29

API Hardness Test Kit GH/KH FreshwaterAPI Hardness Test Kit GH KH Freshwater The API GH & KH Hardness Test Kit accurately measures general hardness (GH) and carbonate hardness (KH) in freshwater aquariums, helping you replicate your fishs natural environment. Maintaining proper GH and KH levels is essential for reducing stress, supporting vibrant health, and ensuring stable water chemistry for both fish and plants. This easy to use kit provides quick, reliable results, allowing you to

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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The product was in great shape when delivered. Even though the package was thin as it is the delivery was made with card and all was well with product. The instructions were good to use and change in my car. Also it showed the make of vehicle so I won’t be confused at all. Overall it was a great buy

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Reviewed in the United States on May 13, 2026

Verified Purchase

Amazon Customer

Cuba, US

★★★★★ 5

Fits my Accord perfectly!

Size: 8.8" x 9.3" x 1.2"

Fits my 2008 Accord perfectly and feels just as sturdy as the OEM I used before, which cost nearly twice as much. Plus, it includes activated carbon, something the OEM didn’t have.

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Reviewed in the United States on May 15, 2026

Verified Purchase

Susan F. Montville

Chelsea, US

★★★★★ 5

Easy to do it yourself and save!

Size: 8.8" x 9.3" x 1.2"

One place wanted $85 to replace this! Another wanted $50! I ordered this for $10, watched a YouTube video and did it myself! Super easy!

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Reviewed in the United States on May 10, 2026