This is what I have been doing, and wondered if it was sound. When I decide that I'm about 10 days to 14 days from chop the next time I need to water I flush my 2 gal. soil cont. with 6 gal of water, back under the light repeat a total of 3 times. After the last flush i just stop watering wait a day under the lights, then 48 hrs. dark and chop. I'll put up a pic of her when I remember where I put my camera.