did this two days ago when I made my new batch with my new granulated blackstrap. 7-7.5 tbs epsom salts, 1.5-1.75 tbs blackstrap, not for any good reason other than I wanted a lil turbo, see if it affects em any.I'm getting close to mixing some more up, I'm thinking about going closer to 7-8 tbps of epsom salts. My deputy is a mag whore, seems like I'm almost always fighting a mag deficiency.