Is my CO2 set too high?
I'm on my first attempt at a high tech tank, and I'm wondering if my CO2 is set too high.
As it stands now, my drop checker is yellow (I'm using 4 dkH) and at the end of the day after the CO2 has turned off the pH and kH read 6.4 and 5, respectively. Using a pH-kH chart, this means a CO2 concentration of close to 60ppm which is clearly waaaay higher than the recommended 25-30ppm.
The reason that I'm asking whether or not this is ok is because I've had it set like this for 4-5 days and all of my inhabitants are fine (harlequin rasboras, otocinclus, and amano shrimp). Are there other things I should be looking for? Should I turn my CO2 down?