Osmocote Plus, the original and most popular method for fertalizing your planted tank. These root tabs provide essential macro and micro nutrients over a consistent period of time due to the slow release cycle.
Their popularity is proof that these are an essential part for all planted tanks for optimal growth and lush leafs. I like sticking these into the substrate using a square pattern throughout my tank. If you have heavy root plants, you can tighten your placement to maximize coverage.