According to the chart provided by API in the API GH & KH test kit
3 drops of KH solution would mean 3 dkh at 53.7ppm
The readings from tap water and my aquarium is 3dkh (53.7ppm) but according to the city of Lansing water analysis posted on the board of water and light website. http://www.lbwl.com/Community-Impact/Water-Quality/Water-Monitoring/ My alkalinity is as follows:
Calcium CaCO3 50
Magnesium CaCO3 40
Total Hardness* CaCO3 90
Carbonate (CO3) CaCO3 20
Bicarbonate( HCO3) CaCO3 15
Total alkalinity CaCO3 35
This does not seem to correlate with the API test kit, either the API test kit is way off or the Board of Water and Light is way off because, if Carbonate (Co3) reported as mg/l is at 20 this would equal 56dkh, or 1000ppm and the Bicarbonate (HCO3) reported as CaCO3 is 15mg/l this would equal 42dkh or 750ppm and the API chart shows that at a dkh of 3 I would have roughly 53.7ppm of KH making the ppm at 1750 for a difference of 1696.3ppm. This seems very off.
Also, having 15mg/l or 42dkh (750ppm) of my alkalinity coming from Bicarbonate (HCO3) would through off my ability to judge CO2 from a KH PH CO2 chart wouldn’t it?
I think I figured out the discrepancy. According to some information I found, I would need to divide the alkalinity reported as CaCO2 by 0.6 to get the correct ppm:
20mg/l /0.6=33.3
15mg/l /0.6=25
For a total of 58.3 and the range between 3 and 4dkh according to the API KH &GH test kit is between 53.7 and 71.6.
According to Tom Barr, Having a portion of your KH from something other than CaCO3 would through off your ability to judge CO2 levels using the KH PH chart. Does anyone know how to correct this, a calculation perhaps?
3 drops of KH solution would mean 3 dkh at 53.7ppm
The readings from tap water and my aquarium is 3dkh (53.7ppm) but according to the city of Lansing water analysis posted on the board of water and light website. http://www.lbwl.com/Community-Impact/Water-Quality/Water-Monitoring/ My alkalinity is as follows:
Calcium CaCO3 50
Magnesium CaCO3 40
Total Hardness* CaCO3 90
Carbonate (CO3) CaCO3 20
Bicarbonate( HCO3) CaCO3 15
Total alkalinity CaCO3 35
This does not seem to correlate with the API test kit, either the API test kit is way off or the Board of Water and Light is way off because, if Carbonate (Co3) reported as mg/l is at 20 this would equal 56dkh, or 1000ppm and the Bicarbonate (HCO3) reported as CaCO3 is 15mg/l this would equal 42dkh or 750ppm and the API chart shows that at a dkh of 3 I would have roughly 53.7ppm of KH making the ppm at 1750 for a difference of 1696.3ppm. This seems very off.
Also, having 15mg/l or 42dkh (750ppm) of my alkalinity coming from Bicarbonate (HCO3) would through off my ability to judge CO2 from a KH PH CO2 chart wouldn’t it?
I think I figured out the discrepancy. According to some information I found, I would need to divide the alkalinity reported as CaCO2 by 0.6 to get the correct ppm:
20mg/l /0.6=33.3
15mg/l /0.6=25
For a total of 58.3 and the range between 3 and 4dkh according to the API KH &GH test kit is between 53.7 and 71.6.
According to Tom Barr, Having a portion of your KH from something other than CaCO3 would through off your ability to judge CO2 levels using the KH PH chart. Does anyone know how to correct this, a calculation perhaps?
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