Nice plants man, also my frist dwc plus i was a soil grower too' infact i got one going along side this dwc unit i made. i was using a ph meter for a soil grow. im using rockwool cube inside my net pot and clay pebbs on top stoping the light get past the corners i had to cut off to get the cube to fit. ive got a 39ltr res and its 2ft deep so the roots will have agood bit to grow plus its only one plant init, ive heard that plants growen from seeds in hydro get really big roots masses, cuttings roots to big enough in hydro never mind them coming from seeds.