Ugh I used to use the Olivia's system... gel and juice... did not find it to be that effective.
My fert guru swears by dip-n-grow liquid... but I've seen his thumb... it's green... both of them, and I suspect he has green big toes too... Actually I'm not ragging on dipngrow, it's got the hormones and a fungicide, so it is GREAT if you have your technique down.