Most people growing in soil indoors do something called flood and drain to waste. Usually the soil is evenly saturated with water until some water comes out all the holes on the bottom of the container. They will over water to just a couple inches extra water comes out to test on, to up to as much as 30% or maybe even as much as 40%-50% more than the volume of soil, to help keep nutrient salts from building up too high and causing any problems. This same technique could be used with a mild nutrient concentration mixed in as well, constantly, or a stronger concentration, and pure water a few times during the next few watering times in-between, before the more concentrated nutrient mix is applied again.
If you are routinely monitoring your EC/PPM runnoff and not using too drastic of NPK ratios, I don’t think the more extreme runoff percentages need be thrown away, but many people do swear by it and then the plant is always getting a mild nutrient flushed through it at every feeding and the soil is always getting heavily flushed to keep any imbalances from building up, but it does require the use of more nutrients. BTW, all the runoff that is “drained to waste”, isn’t necessarily wasted, it is often used on other plants in a person’s yard outside, or some such.
Also the flood to drain, with water or with nutrients, you should then let the soil nearly completely dry out again before re-watering or re-feeding, and this is determined easily enough by the feel of the container and plant when fully saturated with water and then the same when it is nearly totally dry, you can tell when the container and plant are significantly lighter that it is time to re-water.