I guess what im asking is how to use epsom salt with the girls. I just fed 3 nights ago and tonight I have to water. The newer younger leaves are yellowing and some purple stems just at top of plant and I think they say epsom salt will cure it up. I usually feed once and water once every week. I just started flower 4 days ago. Can I use epsom salt in my watering tonight?? If I do..do I have to do a flush or something b/c of using it? Or can I just go right back to schedule and feed in 3 days..? I do use general organic Cal/MG+ in everywatering 2ml per gal.. is that have epsom salt in it or should I not use it if I use epsom salt?