Your plants appear to be overnuted and about 2 weeks old tops. I can't really find anything that you are actually doing correctly so I'm kind of surprised they are growig at at all.....but it is a weed after all.

Ph should be between 5.6-6.2 in hydro......6.8 is too high.
Miracle Grow has no place in hydroponics. NONE. ..... you should be using true hydroponic nutes.

Best of luck to you ......honestly......you've gotten farther than I would have thought with hydro......but you're in for a nasty surprise at some point and I don't want to be involved in it.

Again....good luck. Really.
Weedhound Reviewed by Weedhound on . hydroponics growing advice needed, ok, this is my first set up, lots of research i was able to put together a room for about $200. pics are at the 3 week stage right now i am using 20-20-20 miricle grow, ph is at 6.8 lighting is at 18 hours so far so good, be the judge, pics attached now NEED TO KNOW what next, 1-when i change the water next week, the plant will be 4 weeks old, what is the formula i use--i purchased 15-30-15 mix or do i use something else or stay with 20-20-20 2-when do i change my lighting from 18 to Rating: 5