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Co2 drop checker ?


HJ V6

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hey need some help I got a Co2 drop checker in the mail and im not sure how to use it as it says add water :/ but dosent say how much ???

heres the Instructions

Turn drop checker up-side-down and place 3-5 drop of test solution into the drop checker.

Use a pipette (not include) to inject tank water into the drop checker.

You will see the color change on the solution according to Co2 content in the tank water.

Turn drop checker up-side-down again carefully, and place the drop checker inside the tank below water level.

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I just received mine as well and it's similar to your one. Someone correct me if I'm wrong. My instructions just says 5ml of water but it would depend on the size of your drop checker. Essentially you don't want any of the solution to fall out when you invert it. Going back to my chemistry days I believe the the amount of water does not affect the colour of the indicator. It just makes it easier to see the checker. I've also read it's best to you a 4dKH reference solution instead of tank water. Using this gives you a green colour for 30ppm of CO2 in the water which is the desired amount.

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