I know I must have forgotten everything learned in high school... But, what the heck is up with these directions?
"For 12.5 ppm titratable iodine: add 1/4 oz per 2 1/2 gal water OR 1 tsp tp 1 1/2 gal water"
OR
"For 25 ppm titratable iodine: Add 1/2 oz per 2 1/2 gal water"
Google says ppm = parts per million
okay so where do I go from here.
how do i figure out what PPM i need to go by?
"For 12.5 ppm titratable iodine: add 1/4 oz per 2 1/2 gal water OR 1 tsp tp 1 1/2 gal water"
OR
"For 25 ppm titratable iodine: Add 1/2 oz per 2 1/2 gal water"
Google says ppm = parts per million
okay so where do I go from here.
how do i figure out what PPM i need to go by?