i would put no nutes in and see what they do just plain ph water check the ph daily to see what happens
then after a week change the water and give a light feeding and watch the new growth not the effected aera
your ph will swing accordling to what they eat mor of this or that and like i said you cann use hygro with no problems iin dwc
or if you want to get rid of the slime keep your water temps down or add some sm-90 thats the cure for that
hey i would just use some tap water and start from there and try the lucas on that gh nutes it works im tellin ya
but i woul start with just plain water it look likes tooo much nutes like your ppm or ec is way to high