very nice grow i just wish all neebies would see this .ps, not so hard to grow a plant when your not pushing the hell out of it and getting into problems like nute lockout and defs. and again great job
yes 50ppm to 100ppm as far as how much water? are you in a doing dwc or ebb n flow or drip feeding it. its not how much water useing dwc the roots need to be in solution the other need there roots moist about 4 times a day its amount of nutes to water were you get the ppms you want. the amount...
whats your room temp autos are adapted for cooler temps plus autos have a short life span they have to go fast not sure the third looks paler to me and you said its the cheese one the first one looks ok but smaller not sure about the strain maybe more sativa in one compare to the other room...
if you want a 400 ppm put a little nutes in water stir not shaking test water with ppm meter if too low add a little more nutes repeat process intill you get the number ppms you want the number doesnot have to be perfect but close then after your happy with the ppm number then ph the water, phng...
if you use the water before and no problems it will be ok to use it again i thought it was for babies but you didnot say it was because babies dont like nutes