You mean this?rrkss said:They don't neccessarily destroy the enzymes they just stop making them when CO2 is the primary available source of carbon. Read the barr report article on CO2.
defdac said:You mean this?
"Plants and algae both can and do adapt to low CO2 environments and induce genes to make enzymes that concentrate CO2 around Rubisco, the CO2 fixing enzyme. When we add the CO2 at higher levels back, this causes the plants and algae to destroy the low CO2 enzymes and start growing without of them since they no longer need them to fix CO2 form the KH ( the -HCO3).
Why keep all this machinery around if you no longer need it? Doing weekly water changes "fools" the plants and helps encourage algae more. "
If I understand you and Tom.s response this is not an important factor at all, and it doesn't matter if the tap has alot of CO2?