bruger, man talking about screwing up a potential learning experience. Get your facts straight, have you read the post? I just explained I have used hydrated lime and agree with what you said it does not last, does Deb understand this? Bob described ag lime perfectly. Deb said in a post they recommend "calcium" not hydrated lime. BTW hydrated lime is calcium hydroxide, CaoH, duh not the info needed. I'm tyring to find out what they mean by calcium.