I have 7 plants and 1 has a problem. I think there is a lack of nutrients or something is wrong with the roots. My plants are photoperiod and my pots are 20 lt. I'm on my 50th day. I give ec:0.8-1 ph=6.4 to my plants, when I give 3 liters of water for my other 6 plants, water flows from the bottom of the pot, but I need to give 4 liters of water for this plant to make it flow from the bottom. i'm scared and i can't get to the flowering period please help