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Cal Aqua Labs Nano CO2 Drop Checker

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CAL AQUA LAB's Nano drop checker is designed specifically small or nano planted aquariums. Measuring approximately 3 x 3 cm, it is small enough to appear unobtrusive, yet large enough to provide a clear and accurate reading.

The CAL AQUA LAB's Nano is hand-crafted using only the highest quality, laboratory-grade, borosilicate glass for maximum strength, durability, and visual clarity. Each piece is unique.

Fast response time

Use to measure CO2 levels at-a-glance.

Designed specifically for nano aquariums.

Perfect for aquariums 1 to 15 gallons


One (1) Suction Cup

One (1) Bottle of CO2 "Indicator" Solution (15 mL)

Instructions for use

Customer Reviews

1 review

  • 5

    Smallest Drop Checker out there!

    Complimented my 20C really well. Everything outside of this in a nano tank is an eyesore— I wish they posted comparison pics for reference. I had a hard time finding any extra info or pics of it. I thought I could upload.a pic here to help, but oh well. High quality glass, that’s where the price tag comes from, it’s also the smallest one out there. It’s smaller in comparison to other advertised ‘nano’ checkers. This is a solid find & thanks CALAQ for making these! It’s just what the hobby needed. Stay safe!

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