I bought 2 developers but i can't understand what is written on the bottles, so i will ask here, and i apologize if this question was asked to death. When it is written, to make 1Gallon or 2 Gallon and so, what does that mean? Should i mix the entire bottle liquid for that written to make quantity or just i dilute as necessary until i can reach that written quantity? So if i have one bottle that has written the developer to make 1US Gallon, how much i should dilute to have that amount at the end? I had one of those developer before but it was written to make 5L, but i was using just the diluted solution and didn't mix the whole liquid for 5L, any guidance here please???