If growing in a living soil flushing it with excessive water or drying it out is harmful to that life. As Mad has said the plant is not just a straw that sucks up all nutrients. This is controlled by the plant if growing naturally.
Sorry but please do not PM questions. Post them.
Anybody can be wrong about anything.
"When the facts change, I change my mind.
What do you do, sir?"
"Capitalism is the astounding belief that the most wickedest of men will do the most wickedest of things for the greatest good of everyone."
~John Maynard Keynes~