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Drop Checker is an original glassware unit, designed to indicate the CO2 amount diluted within the water with color change of the pH reagent inside, in order to understand the proper amount of CO2 supply. You can easily judge the proper CO2 supply by comparing the color of reagent with pH color test card.
Get some tap water or distilled water from the grocery store.
Fill the drop checker bulb about 2/3 full of the water.
Add about 3 drops of pH test reagent, to get a strong blue color, but not so much that the water becomes opaque with the blue dye.
Use the suction cup on the "drop checker" to suspend the device two or three inches below the tank water surface, with the "horn" of the "drop checker" pointing downwards. There should be air trapped in the horn. (Refer to picture below)
After a couple of hours, the color of the "drop checker" fluid will be at equilibrium color. Green color - 30 ppm of CO2 in the water. Good dose of CO2 Yellow color - More than 70 ppm of CO2 (Dangerous level for fish) Blue color - 10 ppm of CO2, not enough CO2 for your plants
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Zone
Transit time (working days)
North America
6 ~ 12
Europe
4 ~ 12
Oceania, Asia
4 ~ 7
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For faulty item, please contact us within 3 days after item received, supported by a photo. Replacement will be made. Buyers are not expected to return the damaged items to us.
On Feb-13-07 at 18:57:01 PST, seller added the following information:
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