Hows it going everyone, i just have a few questions regarding my TDS meter, i baught one on ebay, im not sure if i need one im using sunshine mix #4. also, when should i start feeding, its a soil less mix. ive got a 4x2x5 tent with 400w mh/hps im planning on doing a scrog, a question i had about the scrog is does having a few plants grown through a screen give you a hard time when flushing? best regards