CO2 Drop Glass Checker

CO₂ Drop Checker Glass Monitor

Keep your planted aquarium perfectly balanced with this elegant glass CO₂ drop checker — the simple, reliable way to read your tank’s carbon‑dioxide levels at a glance.

Crafted from premium clear glass, this precision‑built monitor mounts easily to your aquarium glass with the included suction cup. No complex electronics required. Just add CO₂ indicator solution (sold separately), set it in place, and let colour changes tell you exactly what your planted tank needs.

What the colours mean

🔵 Blue = Low CO₂ — you need to increase CO₂ supply
🟢 Green = Ideal CO₂ (~20‑30 ppm) — perfect thriving conditions for aquatic plants
🟡 Yellow = Excess CO₂ — reduce CO₂ output to keep fish safe

Key features

• Premium transparent glass for stable, consistent test readings

• Suction‑cup mounting, fast and tool‑free installation

• Compact size: 45 mm height, fits most standard planted tanks

• Designed to mount ~10 cm below the water surface, close to your CO₂ diffuser

• Essential tool for planted aquariums, helps avoid CO₂ deficiency or dangerous over‑dosage

Simple setup steps

1. Clean the glass checker thoroughly

2. Add 5 drops of CO₂ indicator solution (not included)

3. Siphon tank water to fill the solution chamber halfway

4. Flip the checker opening‑down, secure to tank glass with suction cup

5. Allow up to 2 hours for the colour to stabilise and show your real CO₂ level

Package includes: 1 × Glass CO₂ drop checker + suction Cup