The Sera gH-Test makes it easy to measure general hardness (gH) in your aquarium—an essential parameter for healthy fish, plants, and invertebrates. Stable hardness ensures proper mineral balance, buffering capacity, and biological function across all systems.
Each drop-based test provides fast and accurate results within seconds. The 15 ml kit includes everything you need for approximately 420 °dGH measurements, making it a reliable staple for ongoing tank maintenance.
Why It Matters:
Consistent gH levels support osmoregulation in fish, prevent stress, and improve plant growth. Use this test weekly or after water changes to ensure a balanced mineral environment.
Usage:
Rinse the test vial with aquarium water before filling.
Add test reagent drop by drop, shaking gently between each, until color changes from red to green.
Each drop equals 1 °dGH (German hardness degree).
Adjust hardness as needed using water conditioners or remineralizers.
Specifications:
Volume: 15 ml reagent bottle
Range: 1–20 °dGH (1 drop = 1 °dGH)
Test Count: ~420 measurements
Suitable for: Freshwater & saltwater aquariums
Why We Like It:
Accurate, affordable, and foolproof—the Sera gH-Test is the go-to hardness kit for freshwater and planted tanks. Ideal for maintaining mineral balance in Chicago’s variable tap-water conditions.
The Sera gH-Test makes it easy to measure general hardness (gH) in your aquarium—an essential parameter for healthy fish, plants, and invertebrates. Stable hardness ensures proper mineral balance, buffering capacity, and biological function across all systems.
Each drop-based test provides fast and accurate results within seconds. The 15 ml kit includes everything you need for approximately 420 °dGH measurements, making it a reliable staple for ongoing tank maintenance.
Why It Matters:
Consistent gH levels support osmoregulation in fish, prevent stress, and improve plant growth. Use this test weekly or after water changes to ensure a balanced mineral environment.
Usage:
Rinse the test vial with aquarium water before filling.
Add test reagent drop by drop, shaking gently between each, until color changes from red to green.
Each drop equals 1 °dGH (German hardness degree).
Adjust hardness as needed using water conditioners or remineralizers.
Specifications:
Volume: 15 ml reagent bottle
Range: 1–20 °dGH (1 drop = 1 °dGH)
Test Count: ~420 measurements
Suitable for: Freshwater & saltwater aquariums
Why We Like It:
Accurate, affordable, and foolproof—the Sera gH-Test is the go-to hardness kit for freshwater and planted tanks. Ideal for maintaining mineral balance in Chicago’s variable tap-water conditions.
