Give your biOrb a wintry look with Winter Fern Plant Packs. Perfect with Winter Flower Plant Packs and/or Autumn Fern Plant Packs. A heavy round ball on the base of the plant makes it easy to sit the plant in the biOrb and holds it in place. Winter Fern Plant Packs are supplied in packs of two containing one small and one medium plant. Suitable for all aquariums. Maximum plant height 29cm.