Hi Splitty, yep, I've become a big fan of Greenleaf's line. Have used MegaCrop now for more than 18 months on 8 consecutive grow cycle, 46 plants, and a variety of containers. My use used was plain - pretty much by itself. Subsequently I've added their other products Bud Explosion and Sweet Candy (per their recommendations) into the mix. Lately I've add their Kelp as well. They have been very effective for me and are EXTREMELY economical.
Notes: 1) since I run under COB lights, I have always had to add extra cal-meg to my mix. 2) I sometimes get line clogs when running in AutoPots.