The Drinkwell® Aqua Garden® is a hydroponic cat grass garden, designed to work specifically with Original and Platinum Fountain Models. The constant circulation of water causes the 100% organic wheat grass seeds to germinate and begins to grow within a few days, reaching full growth at 7 to 8 days. This natural treat provides fresh vitamins and minerals for pets and aids with digestion and hairball control. Replaceable seed pods are sold separately to continue growing Aqua Gardens® again and again!