I decided to use a dutch bucket system, but i think i might be a little confused on nutrients. So each bucket is about 3 gallons (11 l) and each requires about 1-2 gallons of watering a day. Most people DTW on these. So supposing I had 20 buckets, that's 40 gallons of water/nutrient solution a day. Over a growing cycle say 70 days, that's 3500 gallons. That seems like an staggering amount of nutrients, something like 4 gallons. Am i looking at this the wrong way? This seem really expensive.