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