Aquarium CO2 Acrylic Drop Checker CO2 Indicator (Tear Drop & 15ml)

Super easy to setup and install. They have upgraded the design for the "green ball" people reference loosing is no longer - it's permanently a part of the design now. The indicator works great. I have it on the opposite side from my diffuser. It does take about 1-2 hours to respond to CO² levels but that's standard. Made from acrylic and not glass so you can't break it.

The product is not only very accurate, you can even see the color change without aquarium light. And it’s so easy to clean. The best part is the green dot on the top, even for people like me with no sense of color, it’s easy to see and read if CO2 in tank is appropriate.

Followed the instructions but I’m not sure how good it’s working because I used the co2 system and the color of the monitor never changed

Excelente producto