Pineapple Express / cheap DWC

Last week I added about 3l mix every 2 days. Now concentration is 1490ppm, pH 6.2. Ill make small swap in growbox and also change solution to new one next week. About making solution Means making all the nutrient that plants need available to them in the right blend (like a recipe) We give them more than what they need….in solution strength. Plants will only take what they need. By having a balanced blend we •Reduce (extend) the risk of concentration or shortage of some of the elements •Optimize the use of fertilizers •Keep stable pH (5.5-6.5) We suppose that plant will take elements in proportion of nutrition program, so if they will be in same proportion in solution, pH will be stable. You only need to replenish solution.