Quick Glance

• Handcrafted using the highest quality, laboratory grade, borosilicate glass.
• Use to measure CO₂ levels at-a-glance.
• Innovative dual chamber design allows CO₂ levels comparison with optimal reference color.
• Precise and efficient.

CAL AQUA LAB's "Double Check" is the first all-glass dual-compartment drop checker that allows the user to accurately compare, side-by-side, the CO₂ level in one's planted aquarium against a standard reference solution.

This innovative drop checker is designed to be efficient and accurate, implementing a simple visual comparison of the CO₂ level in one's aquarium with an optimal CO₂ level, indicated by the standard reference solution. The "Double Check" drop checker eliminates the guesswork normally involved in determining which shade of green is considered optimal, and reduces the need for color comparison references. The precise and prime CO₂ level is achieved when the colors in the two compartments are identical.

The "Double Check" is hand-crafted using only the highest quality, laboratory-grade, borosilicate glass for maximum strength, durability, and visual clarity. Each piece is unique.

• Top Compartment - "Indicator" solution
• Bottom Compartment - "Reference" solution
• No solution preparation required.

Included:

• One (1) Suction Cup
• One (1) Bottle of CO₂ "Indicator" Solution (15 mL)
• One (1) Bottle of CO₂ "Reference" Solution (15 mL)
• Instructions for use

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