I have a two bucket dwc system set up and being my first grow I am learning a lot as I go. However I have ran I to a wall, my plant stopped growing and my ph will rise from 5.5 to above 7 in sometimes as little as 5 hours... I use ro water and have been using the flora series nutes. I am not sure why my ph is fluctuating so much. There's a total of 7 gallons of water in my whole system. Thanks for all the help in advance.