Quote Originally Posted by ryo
today. It is all legal( fresh tomatoes and lettuce) but the owner who showed me around was talking and had an interesting point. If I am using a recirculating system, like the waterfarm or any DWC that reuses the nute solution over and over again, how do I judge the nutes that the plants are using and the amount they are using? He said some plants may use one type of nute more than another and another plant may use a different nute in a different amount more than another. So if we only change the solution when the resivour has used all of the starting solution by replacing it with PH balanced water, do you think some of the plants may be suffer from not having what they want? He doesnt reuse his solution water, it just flows from a dripper into waste. That way they always have the correct amount of nutes at each stage. Seems like alot of water to use, but maybe not? I never tried that approach and dont know how much a dripper would put out on a say 12 bucket system. It just seemed an interesting point and I thought someone may have an interesting answer.
That is why you change everything every 5-10 days and you avoid that problem. Another thing is The plant does change it's cycle every 7-14 days so the nutrient requirement should change at the same rate to keep up.