Ξαναλέω με άλλα λόγια:
Ο πίνακας δεν δουλεύει με τα ph-down. To ph κατεβαίνει ασχέτως με το co2 που βάζεις.
Απο το
http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm :
Adding certain "pH altering additives" can cause much confusion as well. Additives like "Proper pH 7.0" which force the pH to a certain value completely invalidate the CO2 / KH / pH relationship. This is because these pH altering additives contain phosphates. Phosphates replace the carbonates in the buffering system. And the CO2 / KH / pH relationship is only valid in a system that is buffered by Carbonates.