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.

Elegant. Seems to work.

The co2 checker is pretty good. The suction cup works great, I haven’t had the co2 checker fall in. The size is a little big for my 10gallon tank. But overall it does its job for my plants to be healthy.

Good buy

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

Excelente producto

I didn’t realize until after buying that this product is so dangerous is has special disposal methods required to not pollute the waterways. Yet at the same time the product is faulty in that it leaks. In just a few hours after having it attached to the tank the seal failed and all of the chemicals ended up in my tank causing several of my fish to die. Several others are still ill but hopefully the medical treatment I’m providing will save the rest. Do not buy unless you want to take those risks. I need a co2 monitor in there but the next one is going to be one that hangs over the edge so it won’t poison the tank. Regret purchasing this defective and dangerous product.

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.

Nothing really hard to. Figure out!

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

It works, but the provided suction cup is so stiff, it returns to its neutral shape, unlocking the vacuum, twice I lost fluid into the aquarium, I have taken this out to find a better way to secure.

Very good and explanatory on how to use. Very simple