How much do spinach/lettuce drink?
I am going to try DWC for lettuce and spinach again. I am looking at a 18-gallon tote. I think I can grow about 12 of them. If the nutrient is not completely filly the tote, maybe I will need about 16 gallons.
Do they really "drink" that much in their life time? The packet says you can harvest spinach in about 45 days. If the nutrients is not used up, isn't it a waste?
Or maybe it "drinks" more that I need to refill? I have only tried small scale indoor once so I have no idea how much they will need. Should I get a shallower tote?