You have several issues here, any of which could contribute to your problem. First, there is nothing in your water a proper pH balancing won't fix- also, since you know how much limestone your water has in it, DON'T add more calcium unless you know they need it. Excess calcium is the best way to cause lockup that I know of.
On to the flush; this just gets the crackle out of the smoke. If your nutes weren't excessive to begin with, flushing for more than a day or two is counterproductive. This is just a way to deal with the results of excess.
Catalyst and hi brix aren't nutrients; they're supplements, and unless the plant needs what they have, they won't do much good. If you want to improve flavor, I'd recommend using earthworm castings. They're loaded with enzymes and these will help flavor. Feeding your soil carbohydrates will boost the activity of your microherd; if the nutes you're adding are too high in dissolved salts (EC is too high), you'll be killing off the very microbes you're trying to feed.
Another place to look is your bulbs; are they old, and in need of replacement? If so, then the spectrum profile they're putting out is going to hinder your plants' growth and development, including proper ripening.
Finally, just because you're running organic doesn't mean you don't have deficiency issues., I'll bet that if your smell and flavor are flat that you don't have enough available sulphur in the mix. Add some epsom salts (magnesium sulfate) at 1-2 mg/gallon (the stuff is weaker than you think, so even 2mg/gallon isn't aggressive). Dilute it well before adding to the res as sulphur and calcium love to lock up and drop out.
Hope this helps!
