I personally ran with 30-60 ml of big bloom when i ran fox farm trio, only because its really to feed the soil. The NPK is 0.01-0.3-0.7, so even at 60ml per gallon, its not going to be enough to even notice a change, i also used it either every wateringor every other watering. I never pushed beyond 10ml of tiger bloom, i usually ran with 7 because they call for 15ml and i ranit half strength.
You really just have to read the plants and know what they need and when they need it. Im starting to understand this more and more now that im using organics.