Coco watering

You only need 10% runoff. If you don't want to do that, go with hydroponics or go with soil. The various ways to accomplish what you want involve flooding the roots for a period of time before fertilization and tying to blindly balance the resulting EC while maintaining some consistency. This will have a domino effect of negative repercussions that may not be seen for weeks or even a month+ later, but they will evenetually happen and something that would have bveen totally avoidable by just doing it the correct way with 10% runoff waste water. If your nutrients are that expensive, buy a different brand. Fertilizer should be cheap. It's made from a pool of potential ingredients that are all ubiquitous commodities. If you paid a premium, you paid for a name. My soilless/hydro nutes mix up at less than 4 cents per gallon. Losing less than a penny per 1gallon irrigation is an acceptable loss given the value it adds and the simplicity of maintaining a consistent "goldielocks" rootzone (well, once you refine the formula to work with 99% of every pot plant, which should only take 2-3 grows to accomplish in a soilless context with good products). There is a domino effect of positive, value-added things caused by the religious 10% runoff. It is not waste. It is providing necessary function. Oh, you can use that waste water outside. It's just no good for a potted plant of any kind. Go toss it on your outside garden or something, then it isn't "wasted"