Replying to @Karina Latina Creator✨ Sand absorbs water quickly, and since gnats like moist environments to lay eggs, they will avoid sand. New gnats will also be unable to emerge The sand gives enough coverage to prevent the adults from laying more eggs and traps the larvae in the soil, stopping them from wriggling to freedom #newplantparent #planttips #fungusgnats #howtogetridofgnats