i would drain as much out of the system as possible,just to be on the safe side. A general guideline for TDS levels : 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. remember u need to subtract the ppm's of your tap water from your nutrients.if your bottle ses 600 and u have 200 to start with.your overal number is now 800 ppm and not the 600 most people think is there.
disrupt86 Reviewed by disrupt86 on . DWC setup help Just went and purchased two 14 gallon containers to start a dwc. This will be my first time growing hydro. I have been reading threads of how many plants i should put in each container but everyone has a different numbers.. I am going to use a 600watt hps system. I was thinking of 3 plants in each container, so 6 in all. how many plants can I fit under a 600hps? I am going to setup it up tomrrow and will add some pictures. But any help would be great. Rating: 5