Quote:
Originally Posted by terim
Thank you very much for your help. I replaced the tap water with distilled in the drop checker and ran air stones all day with no co2 with no change in the co2 reading. I also did a partial water change and the CO2 remains high. The fish are acting fine and not gasping for air so I think my drop checker may be off. I purchased a new KH kit and my reading was 3 degrees. So the test kit was bad. I looked at the link for the Standard, do I need the 4dKH or the 5 dKH?
Thanks again for all of your help!
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If you use 4 dKH water the drop checker will be green at about 30 ppm. With 5 dKH water it will be green at about 40 ppm. I think 4 dKH is best.
Your drop checker will not work if there is just distilled water in it, which has zero KH. The water has to be adjusted to 4 dKH using a carbonate or bicarbonate compound, such as baking soda.