Some epiphyte-type plants such as Anubias or Java fern simply need to be tied or glued onto hardscape. In low lighting tanks that are well stocked, they may not need fertilizer because of their slow rates of growth. However, dosing a comprehensive water column fertilizer once a week isn't a bad idea.Gohi said:Can I grow plants without soil and substrate,may be adding sand only. I will be adding a few intermediate and beginner plants or mesh pot plants(Cabomba Caroliniana, aubias). Can it grow only with liquid fertilizers?