Nutrient strength confusion
I am growing Lettuce hydroponically using DWC 5 gallon. 8 plants per bucket. Using tap water of ppm around 220. The plants are about two weeks old and they are growing healthy and the roots are growing as well into the water. At first I didnt add nutrients. After a week, I added 230ppm of nutrients for a total of 450 ppm and the plants are healthy so far. I am using Flora Nova grow and my PH is 5.8 . My question is why people use a high ppm of 500-900 for lettuce while a ppm of 200-300 suffices. Does it matter if you increase your ppm? Would it give better yields and stimulates the plants growth or has no effect? Thanks!