Hey HappyDaze, I do also use some of the GH supplements with the MaxiGrow and MaxiBloom during the grow. I use the supplements Liquid KoolBloom, Floralicious Plus, Armor Si, Diamond Nector, and FloraNector. The FloraNector and the Floralicious Plus give the greatest results and the Liquid KoolBloom does seem to help the bud growth and development. I say that based on two grows with the same seed stock, one without the KoolBloom and one with it. The grow with it had buds that seemed denser and better developed (not very scientific, but what the heck, I do grow in a closet! LOL!). I have not needed the CALiMAGic as the local water supply has a substantial amount of well water in it with a lot of calcium, magnesium, and other dissolved minerals in it.