Ok still kind of new most of my grows were in a cash crop 3.0 that totally sucked. Now I've switched over to I'm doing 250 watt hps with four CFLs hooded. The two in flower are Auto lemon skunk 55 days from seed and I got 3 feminized non-auto bubba kush in the 5 gallon DWC s This is my first time out of the box I don't know how they're supposed to look. Ppm under the 500 units is 460 if I go to 750 units its in the 600s. Water temperature is 23 degrees Celsius room temperature about 24. Ph 6.2 I feel like they should be bigger than they are now