Thanks @Waira these plants are only my 3 or 4 grow so I'm still learning. This was my first and most likely only attempt in a solo cup. I couldn't decide which strain to grown in my micro cabinet so I figured solo cups would allow me to grow both. I do have one question that maybe you could help me with. At what point should I be concerned with my run off ppm? If my run off is 100-200 ppm higher than feed should I be worried?