A general guideline for TDS levels is as follows: seedlings = 50-150 ppm; unrooted clones = 100-350 ppm; small plants = 400-800 ppm; large plants = 900-1800 ppm; last week of flowering = taper off to plain water
you can up or lower your ppm depending on your needs,if yuor plants look hungry give them a little more ,if you want to lower drain some of the water out of your bucket and add plain ph adjusted water.keep an eye on the salt build up with the botanicare, i always used less than recomended because of this if say you need 5 ml per 5 gallons of water i would use 3 -3.5 ml just to be on the safe side.if you can get some money save up canna nutes are amazing and are perfect for dwc applications.