A balanced NPK fertilizer, such as one with a 10-10-10 or 20-20-20 ratio, can be used for the aquarium. These ratios provide a good balance of nitrogen (N), phosphorus (P), and potassium (K) which are essential nutrients for plant growth in the aquarium. It is important to use a fertilizer specifically designed for aquarium use to ensure that it is safe for fish and other aquatic life. Additionally, it is important to follow the dosage instructions carefully to avoid over-fertilizing and causing harm to the aquarium ecosystem. **

Aquarium plants grow through a process called photosynthesis, where they use light, carbon dioxide, and nutrients to produce energy. They absorb nutrients from the water through their roots and use them to grow and develop. The amount of light, nutrients, and carbon dioxide in the aquarium water will affect the growth rate of the plants. Regular pruning and maintenance are also important for promoting healthy growth and preventing overcrowding in the aquarium. **

Aquarium plants may not grow for several reasons, including inadequate lighting, poor water quality, lack of nutrients, and improper planting techniques. Insufficient lighting can hinder photosynthesis, which is essential for plant growth. Poor water quality, such as high levels of ammonia or nitrites, can also inhibit plant growth. Additionally, if the plants do not receive the necessary nutrients, such as carbon dioxide, iron, and other trace elements, they may struggle to grow. Lastly, improper planting techniques, such as burying the plants too deeply or not providing enough substrate for the roots to anchor in, can also hinder their growth. **

To make iron fertilizer for your aquarium, you can use iron chelate, which is a water-soluble form of iron that is readily available to plants. Dissolve the iron chelate in water according to the manufacturer's instructions to create a solution. You can then add this solution to your aquarium in small amounts to provide the necessary iron for your plants. It is important to monitor the iron levels in your aquarium to ensure that you are not over-fertilizing, as this can be harmful to your fish. **

Yes, lotus can be grown in an aquarium. However, it is important to note that lotus plants require specific conditions to thrive, including warm water temperatures, plenty of sunlight, and nutrient-rich soil. Additionally, lotus plants can grow quite large, so it is important to have a large enough aquarium to accommodate their size. With the right conditions and care, lotus can make a beautiful and unique addition to an aquarium. **

For a 30-liter nano aquarium, a liquid fertilizer specifically designed for small tanks like Seachem Flourish Excel or Easy Green All-in-One Liquid Fertilizer would be recommended. These products are formulated to provide essential nutrients for plants in smaller aquariums without causing an imbalance or overdosing. It is important to follow the dosage instructions carefully to ensure the health and growth of the plants in the aquarium. **

The aquarium water becomes cloudy because the fertilizer contains nutrients like nitrates and phosphates that promote the growth of algae and bacteria in the water. As these microorganisms multiply, they can cause the water to become cloudy. Additionally, excess nutrients can lead to an imbalance in the aquarium ecosystem, disrupting the natural equilibrium and causing cloudiness. Regular water changes and proper dosing of fertilizers can help maintain water clarity in the aquarium. **

Waterweed, also known as Elodea, grows very well in the aquarium. It is a fast-growing plant that can thrive in a variety of water conditions and lighting levels. Waterweed is known for its ability to absorb excess nutrients and provide oxygen, making it a great addition to any aquarium. It is also easy to care for and can help to create a natural and balanced ecosystem within the tank. Overall, waterweed is a popular choice for aquarium enthusiasts due to its hardy nature and beneficial properties. **