Product description
CO2 LIQUID INDICATOR SOLUTION 15ml
✅ A wonderful solution for feeding fish and observing their living condition.
✅ Different color of liquid represents different concentration of CO2.
🔵 BLUE means that CO2's concentration is too low.
🟢 GREEN means it is normal.
🟡 YELLOW means that CO2's concentration is too high so that it is harm to fish.