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Drop Checker Solution CO₂ – CO₂ Indicator Solution for Aquariums (HYDRA Fertilizers)
The Drop Checker Solution CO₂ from HYDRA Fertilizers is an essential testing solution for planted aquariums that use CO₂ injection systems. It enables visual and continuous monitoring of dissolved carbon dioxide levels in the water column, helping you maintain the optimal balance for plant photosynthesis and overall aquarium health.
Using a pH indicator, the solution changes colour based on CO₂ concentration, allowing you to accurately determine whether CO₂ levels are within the ideal range (typically 20–30 mg/L). Proper CO₂ monitoring helps prevent both under‑dosing and overdosing, which can negatively affect plant growth and fish health.
Key Benefits
✔️ Visual CO₂ indication – easy to read
✔️ Helps maintain optimal CO₂ levels for aquatic plants
✔️ Essential for aquariums with CO₂ injection systems
✔️ Supports healthy plant growth and vibrant colours
✔️ Simple to dose and use
Features
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CO₂ testing solution compatible with most drop checkers/CO₂ indicators
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Ideal for freshwater planted aquariums
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Stable and reliable formulation
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Safe for continuous use
How It Works
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Fill the drop checker with about 4 ml of solution (or according to your checker’s instructions).
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Place the drop checker submerged in the aquarium, away from direct CO₂ diffusion.
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Observe the colour change:
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Blue – Low CO₂
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Green – Ideal CO₂
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Yellow – High CO₂
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Adjust CO₂ injection as needed.
Usage Instructions
Replace the solution every 2–4 weeks or whenever the colour has faded. Store the solution in a cool place away from direct light.