I am in my 3rd week of flower and my plants are showing a nutrient deficiency (phosphorus I think) with dark purple splotches on the leaves. I was wondering what you guys think. I just tossed all the trimmed leaves that's why I don't have pics, but the only reason it would be deficient is if it was locked out because of magnesium deficiency. Do you think Dr Teals foaming bubble bath would be a decent source of magnesium or would the other chems in it hurt my grow? Thanks guys. I'll attach the most recent pics in case you guys can identify by any leaves I might have missed.