Right now, I am using Excel as a CO2 substitute, but it is becoming more of a pain than it is worth. Especially because I have a 90 gallon tank, and I go through a large amount of Excel very quickly. So I think I might go with a pressurized CO2 system.
My tap water is at about 7.5 Ph and it is very hard. The test strip indicates that the GH is around 100ppm and the KH is around 200ppm. Lets say that I want a CO2 level of 30ppm with a target Ph level of 7.0 (this is according to Chuck's calculator). What happens when I change 50% of the water? Wouldn't the PWC immediately change the Ph from 7.0 to 7.25 until the CO2 could be dispersed? I have discus and I don't think that they would like that. BTW, they seem to be fine with the higher Ph, but probably not a Ph swing.
My tap water is at about 7.5 Ph and it is very hard. The test strip indicates that the GH is around 100ppm and the KH is around 200ppm. Lets say that I want a CO2 level of 30ppm with a target Ph level of 7.0 (this is according to Chuck's calculator). What happens when I change 50% of the water? Wouldn't the PWC immediately change the Ph from 7.0 to 7.25 until the CO2 could be dispersed? I have discus and I don't think that they would like that. BTW, they seem to be fine with the higher Ph, but probably not a Ph swing.