I am brand new at hydro and thought I had it all figured out...turns out it dont! I germinated seeds and when they were 1/4" sprouted i put them in rockwool, in the net pots, with pebbles and plain ph tested water. The sprouts turned to mush. What did I do wrong? Rockwool too wet? Rockwool needs to be treated with nute's? Dumb question here, but does the rockwool sit on pebbles or do the pebbles just surround the Rockwool. I ask because even though I have the water level just to the bottom of the pots the Rockwool is very wet. Any help would be great.