would this work for watering seedlings (in rockwool) in a prop tray wit dome: if the roots grow down searching for water wouldnt it be a goood idea to just fill the bottom tray with just enough water so that the top tray (one that holds each rockwool cube) is just a little bit submerged in water. this would keep just the bottom part of the rockwool cube wet so the roots have to "dig" down to search for water thus giving you some good roots? or would this be a bad idea? i ask cuz when i searched how to water rockwool cubes it seemed people just said to not spray and just lightly pour water around the rockwool.