CO2 Indicator Solution Drop Checker Solution for Aquarium 60ml

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.

Tengo que esperar que la solución haga efecto y cambie de color. Cuando lo haga y compare con mi test de ph actualizaré la reseña.Actualización: El primer día tarda en verse reflejado el cambio del color del líquido. Pero ya quedo funcionando correctamente.

Kinda bummed I didn’t notice…without solution. So I have to order the solution.

Good for nano tank

Exactly as described. First one came in broken, was quickly replaced.

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

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.

I've had several CO2 checkers over the years, with some being quite expensive when they all do the same thing. I wanted to give this little gadget a try. I love the shape and the size. I like the indicator to let you know what the CO2 levels are.The instructions were a little tricky, but I'm putting that on user error, not on the device. I noticed that some other people in the reviews expected solution. As did I, but then I went back and realized I bought the CO2 checker not the checker + solution combo. No worries, I have plenty at home, but be sure to double check which one you are picking if you need solution!I may just end up buying a couple more of these as backups.