Drop Checker

cbwmn said:

I was looking into buying a drop checker.
Reading about crop checkers, I realize that they are only a glass container that hangs inside the tank with PH reagent inside.
I already have a KH/GH and several PH tests kits. These will tell me the same thing
as a drop checker. I already check my PH levels daily.
I really don't want more unsightly hardware inside any of my tanks.
So, why do a lot of folks recommend a DC for indicating CO2 concentration?

Thank you
Charles

Click to expand...

Sorry about the typos. I haven't checked "crops" in years

There are a variety of factors which could influence your kh, and pH. With a drop checker, the only thing affecting the pH of the solution in the bulb is the amount of CO2 in the water. The CO2 in the water will diffuse out of the water and into the liquid in the drop checker and change its color (pH). You eliminate any other acids etc which can affect pH/kh relationship.

But if you're using the kh/pH relationship and your plants and fish are doing fine, and you're satisfied, stick with it. A drop checker is not a mandated item for the tank.

I think the thing you didn't realize is that the drop checker is supposed to have 4dkh distilled water inside it. That is why it's not the same as checking your KH/GH and PH ratios of your tank. That is how you are assured a certain CO2 level. As Bert said, it's not mandatory, but it sure is helpful. At least you know what CO2 you have in your tank in that area.

Personally I think DC's are not even necessary, just watch the fish and plants, make them both happy and life is good.