How to measure CO2 level in the tank?

[qngwn]

hi bros

would like to ask you guys how would i be able to measure CO2 levels inside my 2ft tank.

what should i do to measure if:

my tank substrate is base fertilizer + lapis sand

or

my tank substrate is ADA Amazonia II



thanks in advance!

[Shadow]

general answer: if you do not have anything that effect water pH or kH, you can use the pH vs kH table to determine your CO2 level. But if you have something that effect your water pH or kH, such as peat, ketapang leaves, ADA soil, etc, you need drop checker.

[qngwn]

pH and kH we can use the test kits to determine yea?

drop checker what you mean?

[ghim]

Drop checker is an equipment filled with CO2 indicator solution.

[qngwn]

is that a drop checker that is in the picture?

[dcwk]

Yes, it's a drop checker. You can create your own KH4 solution easily. Do a search on drop checker.

[bossteck]

Take a look at this sticky for an alternative way of measuring co2 level in your tank.

[Shadow]

that is the other way, you need pH meter for that as mention. I personally prefered drop checker, many assumption to these method.

[Puffer]

Robert, Are all drop checkers in the market similar? Or are there any brands or specifications that we should look out for?

[Shadow]

They all similar, working with the same priciple, just different look. I myself preffered the glass version (ADA knock off). Since you are using ADA aquasoil, use kH = 4 solution instead of your tank water. There is old thread on this.