Hi all - I admit I'm just starting out in this, but I have been watching and taking notes from a long time friend who has been growing with hydroponics for several years, and she has commented numerous times about the dangers of overfeeding, especially with the flowering nutrients. She has been using the GH MaxiBloom along with other micro nutrients . . . and is fanatical about using exactly the right measurements when mixing up a batch of nutrient solution. These GH hydro nutrients tend to be extremely high density / high purity compounds, so tossing a bit extra nutrient into the mix can actually cause problems.

Of course, as we all know, consistent temperature of the solution is also important. Well, that's my 2 cents worth . . .