okay gents, bit of advice needed here.all my seeds popped all over 2" in height and a root popping through the rock wool. so i fill the dwc buckets ,pop the airstone etc in get it running, wash the hydroton, fill the bucket until they just touch the arse of the net pot(?, i do this at first until theres enuff root thru and then reduce the watera bit until its around and inch or so below the net pot base?) put cubes in and put enuff pebbles to surround and support the cube. do i add any nutes at this point and if so how much per litre? i'm using Ionics. im putting them on 18/6 under a 400 dual spectrum. does everything sound ok gents, any advice here is welcome.