Strawberry Cough - Newbie DWC

Wasn't planning on making a diary for this (my second) run so not a ton of pictures the first several weeks. Growing along side another bucket with a Sweet Seeds Black Jack (separate diary, same grow methods) Tossed a seed into a shot glass of EC=0.4 pH6 tap water but she sank before popping so I moved her to a paper towel in a bag. She sprouted okay, moved her to a trimmed rockwool cube on a heated tray with humidity dome. Fed only tap water.