I prefer the Earth Juice line of nutrients over Bio-Bizz, but both have good reputations. Perhaps you just had a bad batch of nutrients that were over concentrated or accidentally mixed them wrong. Since you've had successful grows with Bio-Bizz before, it seems awkward that this problem would randomly happen to one crop. Sounds like human error to me. Just be sure to start them off with a 1/4 or half strength mix, you don't want to give them a full dose right away. Hope this helps.