I use 1Tbsp of Molasses and 15 ML of sweet every other watering. I add it to my regular nute watering and then the next watering I use plain water.

Hasn't caused me any problems at all.

I've had PH problems recently but this is due to heavy flushing I had to do and part of my medium being peat based <grrrr>.

You should be fine I would think but I haven't been growing long enough to provide expert advice, this is just from my own personal expierence.