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🐠 Keep your aquarium thriving—test like a pro, stress less!
The API GH & KH Test Kit is a compact, easy-to-use freshwater aquarium water testing solution that accurately measures general and carbonate hardness. Designed for weekly monitoring, it helps aquarists replicate natural fish habitats and prevent harmful pH fluctuations, ensuring healthier fish and plants. The kit includes two test bottles and capped tubes, backed by API’s 60-year legacy of trusted aquarium care products.


















| ASIN | B003SNCHMA |
| ASIN | B003SNCHMA |
| Best Sellers Rank | #3,100 in Pet Supplies ( See Top 100 in Pet Supplies ) #3 in Aquarium Test Kits |
| Brand Name | API |
| Color | DAA |
| Customer Reviews | 4.7 4.7 out of 5 stars (5,862) |
| Date First Available | June 20, 2004 |
| Date First Available | June 20, 2004 |
| Department | Unisex-Adult |
| Department | Unisex-Adult |
| Directions | It is necessary to test the GH and KH to monitor water quality and prevent stressful conditions. |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 2.75 x 1.63 x 5.13 inches |
| Item Package Dimensions L x W x H | 5 x 2.83 x 1.73 inches |
| Item Weight | 2.5 Ounces |
| Item model number | 58 |
| Item model number | 58 |
| Manufacturer | Mars Fishcare |
| Manufacturer | Mars Fishcare |
| Material | Plastic |
| Model Name | GENERAL/CARBONATE HARDNESS KIT |
| Number of Items | 2 |
| Product Dimensions | 2.75 x 1.63 x 5.13 inches; 2.5 ounces |
| Size | 2.5 oz |
| Style | GH & KH |
| Target Audience Keyword | Fish |
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