Aquarium fertilizers come in liquid and solid types. Solid fertilizer is usually below the substrate, under the roots of the plants. Liquid fertilizer goes directly into the water. Heavily planted aquariums require more fertilizer than with sparse plantings. Typically require brighter plants fertilized more often than slow-growing species. Over-fertilization with rare water changes will lead to algae and nutrients build.
Micronutrients include boron, copper, molybdenum, iron, zinc, cobalt and manganese. These essential nutrients are absorbed with frequent application of fertilizers. Your aquarium will not need large amounts of micronutrients in order to thrive.
Macronutrients include calcium, nitrogen, phosphate, chloride, sodium, sulfate, potassium and magnesium. Fish feed, feces, rotting vegetation and additional fertilizer will add them to your aquarium. Take a healthy aquarium water changes and still use decent amounts of macro nutrients for plants.
Your aquarium substrate provide essential nutrients. The choice of a base substrate with sand or gravel are filled nourish plant roots naturally. Carefully placing fertilizer tablets below the plant roots will ensure proper feeding.
Without proper lighting, and in some cases, CO2, not your plants will thrive. Low-light plants such as Java moss and Java fern do not need much light or added CO2. Typically, high-light plants benefit from added CO2, bright light and added fertilizer. Too much light and fertilizer causes algae outbreaks. Tune your fertilizer, light and CO2 on the type of plants you intend to keep. Remember, some plants require a certain level of water hardness. For the best results, you explore your plants before buying.