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Discussion Starter · #1 ·
My pH is 6.5 and my KH is 4 deg. This puts my CO2 at 37.9 ppm, according to the chart. Why aren't my fish gasping for air?
 

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The fish probably aren't gasping because you don't have that much CO2 in the water. That chart doesn't work at all accurately for typical aquarium water, only for water that has nothing in it that affects pH except CO2 and carbonates. The chart normally gives much too high a CO2 concentration when used with a typical aquarium.
 

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Discussion Starter · #6 ·
So should I not even bother any more with charts and tests and drop checkers, etc., and just let the fish be the judge?
 

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So should I not even bother any more with charts and tests and drop checkers, etc., and just let the fish be the judge?
Yes! Drop checkers are useful and can help you get close. Watch your fish..... turn it up little by little (daily and slowly) until you notice them get edgy then back off a hair. Some fish will flash. Kind of a quick sideways dart well before they start to gasp.

When everything is right you plants and fish both will be very happy.
 

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Simply not possible to write up a chart to cover all the water types that it is meant to cover. Accepting as totally true most of the things we use is really risky if we don't watch for unusual things to happen. If you take ten CCR reports from across the country and compare them, you can get an idea. Any chemical reaction may be changed when other chemicals are present so there really is no way to get an accurate readout of what will happen in all cases. The water reports only cover the items which are tested. Not shown are the hundreds of other items that are not tested or regulated.
I do fish as a primary and plants second so if I see fish in distress, I back off.
 
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