I have got up to 90 ml before, IME its too Damn much for my grows and not really necessary. The important thing you mentioned is "if they can take it," and even then its a lot of bone and should be paired with BK to keep it moving. A sweet spot in my grow 45 - 60 ml!! I try to keep on a ramped up track from flip to week 5/6, then I START backing off. Your right, once they get a taste it seems the sky is the limit and they will take all they want and ask for more but IMO there is a tipping point that sacrifices taste. I do however recommend trying to push as hard and as high as you can as you may find its what your looking for in the end product and/or find the plants peak before it starts burning tips Then you can start to dial your feeds on the following grows with a goal in mind. The same concept can be applied across the whole line, as I introduce a new bottle that I plan to run for 2 weeks or more I start low and ramp up!! Another thing to note is when HERC is pushed, amino acids need to be pushed too. And don't be afraid to bump up the base nutrients- Medusa or Gaia - this can be extremely beneficial when trying to keep nectar addicted plants happy!! In theory, as Herc is increased, other bottles should be too to keep uptake of nutrients balanced, as we rely on The Herc to carry The nutrients and minerals into the plant. So if we just slam HERC IMO its too much phos and not enough of everything else and over fertilized Phos effects flavor. ......The only bottle I never change is Zues, 5 ml the whole grow.