Aquatic CO2 Glass Drop Checker, Without Solution

Pros: Ease of use More effective than typical designs no leaking whatsoever inexpensive cons: Aesthetics Possibly, the suction cup quality I'm not a fan of the typical glass Co2 checkers because of their fragile nature, so this acrylic checker was exactly what I was looking for. It's durable, no leaks whatsoever, and it can be cleaned and refilled easily when needed with no worry about breaking something. Further, I had no problems whatsoever reading the color of the drop solution. The biggest advantage isn't that these are inexpensive, It's that this unit actually is *more effective* than the usual typical glass designs you see because it *responds quickly to changing water co2 levels* more so than the usual glass types. Honestly, the only drawbacks I can think of is the suction cup seems to be a weak point (easily replaceable) and perhaps it may not look as fancy to some. Neither one of these is a deal breaker for me. Fully recommend this one.

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.

Great product

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

Elegant. Seems to work.

Excelente producto

Bad design, the fluid leaks slowly to the aquarium after a month. Do not buy this garbage product

CO2 checker works fine, but does not come with indicator solution. Purchase that separately.

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.

Funcional para medir cantidad de CO2. Peso el kit de cristal con solución y se siente de muy buena calidad.

Very good and explanatory on how to use. Very simple

I've used CO2 Solutions for many years - I am confident that something is up with this product as it doesn't show any color at all.

I have just started using CO2 for my aquarium plants. In order to maintain the proper concentration until I get enough experience to 'read' my plants directly I am using the CO2 Drop Checker. So far it is behaving well and I expect it will continue to do so.