While there are many recipes for dosing nutrients, for most basic setups with hardy plants, a liquid fertilizer made by a reputable company will perform well.
While there are many recipes for dosing nutrients, for most basic setups with hardy plants, a liquid fertilizer made by a reputable company will perform well. When selecting a good liquid fertilizer, look for a supplement with trace elements such as iron, manganese, boron, zinc, etc., and one that has a good ratio of nitrogen (N), phosphorus (P), and potassium (K), otherwise known as the NPK ratio. Ideally, a ratio of N with one to two times the K and minimal or zero P is advisable. Plants do require P, but excess can lead to algal blooms and there is usually sufficient P in the aquarium from fish waste and fish food to fulfill the requirements of most plants.