Hmmm... you know, I've been growing a few years but my main focus is still on growing healthy plants. I find that there is almost always something I'm doing slightly wrong Ph mistakes, slight overfeeding or underfeeding usually, which affects the plant health a bit and therefore must reduce yield. So my main focus has been on plant health and increasing yield that way. Once I feel I can grow healthy plants from start to finish (I'm getting closer now) , and have a handle on all the little subtle details and kinks that come up in the road, I might start exploring other tricks and supplements and stuff.
Other than that sort of non-answer, the main way to increase yield is to make sure that the plant is well lit, which often involves training to maximize the lit part of the plant canopy.
There are many many growers here who know lots of possible yield enhancing tactics and additives. I'm just not one of them
I have no science to base it on, but I would think even diluted sugars would not be good in a hyrdo, I mean some nasty stuff can grow in a forgotten pop/soda can(depends where you live) with a little pop/soda in it in much less than a week. Lovely green and white stuff, which may or may not be a good fungus though I guess. But I have no experience with Hydro just expressing what my gut says.
