Radix, root growth promoter for planted aquariums, Aqualine Buschke. Radix is a two-part product designed to speed up the establishment of newly placed plants in fresh water aquaria. When the new plants are introduced into the aquarium, the root growth promoting tablet (A) is placed in the area of the root. Approximately one week later, when the plants have started to produce new roots, the growth starter tablet (B) is placed near the plant to stimulate leaf growth. 15 tablets each of Radix A and Radix B