I love fish mix, but I've found the opposite. When using fish mix, I had some sort of cal/mag issue, since using grow only, i've had no issues. So I think i'm sticking with grow, at least in bloom stages.Great grow pal,I bend them same as you, going back to the fishmix, I use that exclusively now as grow and ii trying one at the moment all the way with nothing but,and seems to be doing well, I always use to have Cal,mag probs before I switched,I add a dash Epsom salts to each feed as well but that's it, it don't half smell through