APT 3 / COMPLETE provides the answer to one of the planted aquarium’s most tricky challenges: how to unlock richer colours, satisfy the most demanding plants and keep algae under control through a single, simple application. Its unique Capstone Formula achieves this Goldilocks Zone where slight nitrate limitation unlocks more vibrant, deeper coloration in many popular species, and a calibrated ratio of other minerals boost growth, improve form and reduce algae risk.