- Messages
- 265
- Location
- Alvarado Tx United States
Ihave looked through the book and seem to be unable to find a discription of the key. I now the first 3 but not sure of the last 2 most of the time R has other leters after it (ie b,m ect) D I think is water chem it useally has D 3-4 1-6 ect is that the PH or is it dificultyand what does the letters after R mean. thanks for the help and rehashing this again.
Curtis