If you do overdo it, Clearex or a similar salt leeching/clearing solution will do you right and get your soil back to zero more or less (check pH) then you can start clean, most likely with less nutrients.

N is the easiest to clean out, as it can be washed away with nothing but water... so if you think that's the culprit, just flood them really well until you are getting totally clear runoff.

And yeah, I use soil and water about every 2 days as well (less for my big one in the 3 gal) and feed every other watering. I'm using BioBizz Grow and Bloom, GH Organic's CalMg+ when needed, and Roots Excelurator in the beginning and after transplant.