CodeSection
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I stopped using Go Ferm because I read somewhere about it containing copper. Today, I contacted Scott Labs to try to get accurate information on what heavy metals was in it. They were kind enough to email me the attached pdf file.
To my surprise, it does not contain copper. However, even a greater surprise was that it contained < 3 mg / kg of arsenic! So, I briefly researched acceptable levels of arsenic in water and found:
"What is the regulatory standard for arsenic in drinking water?
The current drinking water standard, or Maximum Contaminant Level (MCL), from the U.S. Environmental Protection Agency (EPA) is 0.010 mg/L or parts per million (ppm)."
Next, I found the kg to liter conversion is 1 kg = 1 liter. Dosage per pdf file is 30 g/hL.
Recommended dosage for starters is 1.25 per 1 g of yeast. So, say US-05 11.5g packet x 2 for a 11 gallon batch equal 23g x 1.25 = 28.75g.
11 gallons = 41.6395 liters. So, 28.75g/41.6395 liters = .69045g/liter. That equals 690.45mg of Go Ferm Protect in the fermenter. 3mg/1000= .003 690.45mg x .003 = 2.07135mg
What am I missing here?
To my surprise, it does not contain copper. However, even a greater surprise was that it contained < 3 mg / kg of arsenic! So, I briefly researched acceptable levels of arsenic in water and found:
"What is the regulatory standard for arsenic in drinking water?
The current drinking water standard, or Maximum Contaminant Level (MCL), from the U.S. Environmental Protection Agency (EPA) is 0.010 mg/L or parts per million (ppm)."
Next, I found the kg to liter conversion is 1 kg = 1 liter. Dosage per pdf file is 30 g/hL.
Recommended dosage for starters is 1.25 per 1 g of yeast. So, say US-05 11.5g packet x 2 for a 11 gallon batch equal 23g x 1.25 = 28.75g.
11 gallons = 41.6395 liters. So, 28.75g/41.6395 liters = .69045g/liter. That equals 690.45mg of Go Ferm Protect in the fermenter. 3mg/1000= .003 690.45mg x .003 = 2.07135mg
What am I missing here?