I've been experimenting with mine for a few weeks now as well, i've only used the hozon. At first i had it right before a 50 foot hose. I went though about 1 gallon of premixed solution in a week of watering. I realized i wasn't pulling as much as I should have been and was getting sputtering in the line at times.
In order to up the rate it pulled I bought a second 25 foot hose which i placed after my 50 foot hose and i put the hozon in between the two. I use a brass control valve in front of my masakuni nozzle. If the control valve isn't open fully the hozon still doesn't pull at full strength. The problem with that is even with a masakuni nozzle at full pressure on my line thats enough to knock soil out of my pots. What i've started doing is filling up my watering can each time at full pressure with the hozon. Gives you a very strong pull and I can go through a full 5 gallon bucket of solution in 2 days of watering vs seven days when it's before my 50 foot hose. I'm using .5 cup of gropower plus, a small amount of kelp as gropower is low in the K range and kelp is high in the K range and low in the N and P ranges, and a few tablespoons of azomite for micronutrients. Once the watering cans filled up it's pretty murky with the pressure issues out of the way. I'm thinking using this much fertilizer every day is too much, so for now I plan to use it once a week and see what results I get. I could just cut the dilution to use it daily or measure it with a TDS meter to see what strength the hozon is making it compared to full strength.
I do not use the hozon on developed trees as I prefer to monitor whats going into each one more accurately, but I am using it for all the younger stock i'm growing out now. When I was up in Portland at M. Hagedorns this spring someone asked about siphons. He doesn't use one at all. He fertilizes every tree by hand as more developed older trees don't need as many nutrients and you don't want rapid leggy growth on an older developed tree you just want to maintain it's health and vigor. Younger trees need rapid growth to evolve and heavy fertilizing may be beneficial, weak trees have special needs, newly repotted trees might only get kelp or nothing at all.