Never put a plant in any grow media completely dry. Roots always need moisture and oxygen. Always water media to run off before putting a plant in it. Then hand water the plant from the top until it can actually drink from the reservoir. This may take 2-3 weeks for the roots to get established in the pot enough to where they’ll suck up water from the reservoir daily. Young clones and seedlings without an established root system can not drink much water from the pot, much less pull water from a reservoir. Don’t have media/roots sitting in stagnant reservoir water for multiple days with the level not moving.