First time Hydroponic grower, chemical question

[onlyhomegrown]

well me and my cousin decided to startgrowing hydroponic he said he knows everything except the 3chemicals we need to dillute with the water can someone please explain what these 3 chemicals are and also how much of each should go into the water please and thank you, its greatly appreciated

[socialistpete]

If your cousin doesn't know about nutrients then he doesn't know anything about hydro. Read this: http://boards.cannabis.com/hydroponics/93676-latewoods-legacy-gh-3-part-calmag-tutorial-discussion.html