So, I'm in the process of converting a wash room for mothers.. and I'm in need of some brains.. I wanna run a 55 gal rez with ro system and auto shut off valve, with a submersible pump to feed 8-12 plants. I'm him a have to be topping off the rez weekly since they going to be mothers but I'm unsure what size pump i would need? and also an octabubbler could cover how many plants? and how will I have this rigged to a timer to automate my waterings..? thanks for the help in advance.