Hardness Test Kit – KH & GH Aquarium Water Tester | Buy in Sri Lanka from Minipura Aqua
Ensure your aquarium or pond stays healthy with the Hardness Test Kit, the ultimate solution to accurately monitor the KH (carbonate hardness) and GH (general hardness) levels of your water. Proper water hardness is essential for maintaining a stable environment for your fish, plants, and aquatic life.
What is KH (Carbonate Hardness)?
KH, also known as total alkalinity or carbonate hardness, measures the buffering capacity of your aquarium water – how well it can resist sudden changes in pH. Maintaining the correct KH is crucial for the health of your aquatic environment.
Ideal KH Levels:
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Minimum: 4 dKH
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Recommended: 6–8 dKH
What to Do if KH is Low or High:
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If your tap water KH is above 6 dKH, regular water changes usually maintain stable KH.
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If your tap water KH is below 6 dKH, add a KH buffer like KH Up – pH Stabiliser to achieve the desired level.
How to Test KH:
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Use a clean test tube.
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Add 5 ml of water sample.
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Add KH reagent one drop at a time, mixing between drops, until the solution turns from pale blue to yellow.
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Count the total drops used (including the first drop) – this equals your KH in dKH.
⚠️ If the first drop turns yellow, KH is below 1 dKH – dangerous for fish.
What is GH (General Hardness)?
GH measures the total dissolved minerals in water. Water hardness affects fish health, plant growth, and even the buildup of limescale. Hard water species thrive in higher GH, while soft water species require lower GH.
Ideal GH Levels:
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Soft water species: 3–6 dGH
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Hard water species: 10–15 dGH
What to Do if GH is Low or High:
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If water is too hard: Use reverse osmosis (RO) water to soften.
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To increase GH: Add calcium carbonate rocks or other mineral sources for a continuous GH supply.
How to Test GH:
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Use a clean test tube.
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Add 5 ml of water sample.
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Add 2 drops of GH A reagent and mix (solution should turn dark pink).
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Add GH B reagent one drop at a time, mixing between drops, until color changes from pink to blue.
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Count the drops – this equals your GH in dGH.
⚠️ If the first drop turns blue, GH is below 1 dGH – extremely soft water.
FAQs – Hardness Test Kit
Q: Why do I run out of one reagent before the other?
A: Our reagents are carefully filled and quality-tested. Minor differences in bottle fill levels may occur, but you can perform all the tests stated on the packaging.
Key Features:
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Accurate KH and GH measurement for freshwater aquariums and ponds
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Easy-to-use, step-by-step instructions for beginners and professionals
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Helps maintain optimal water conditions for fish and aquatic plants
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Comes with long-lasting reagents to perform multiple tests
Buy Hardness Test Kit in Sri Lanka from Minipura Aqua – the trusted source for high-quality aquarium supplies. Ensure your fish thrive with the perfect water hardness and keep your aquatic ecosystem healthy and stable.
Upgrade your aquarium setup with the Hardness Test Kit – Order now and experience the difference!











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