I'm currently using Superthrive at 1 to 2 drops per gallon. the recommended dosage on the bottle. Also I am currently using Superthrive on my new 16 Hamatas. Both as a root and Foliar feed. They all seem to be growing nicely and have already shown new and bigger growth since I received them.
I'll post some pics of them on here when they show a bit more noticeable growth since I received them. Superthrive will have negative effects though if you use too much of it just like any plant growth product. I just stick to 1 to 2 drops per gallon to avoid any harmful effects.
Although it is your choice on which plant feed product you choose to go with using.