depends on what your starting p.h. is.how much lemon per gal
thanks lemon jucie dose work well im droping it down and then useing it all in my soil plants .so not to worry about it going back up.all my water is mixed and use at that same time i dont store it.but thanks learn something new every time i get on here so props to this site for sure.
Just for the sake of argument, I can get a quart of lemon juice for quite a bit less than $10.