2. Shui Rong: Shui Rong is an aquatic plant of Araceae distributed in West Africa. Compared with other aquatic plants, it can be said that it is very tough and easy to grow. But if cultivated at will, it will slowly lead to root rot and dwarfing, and eventually lead to withering. Like plenty of sunshine, the water hardness should be slightly higher, the nitrate content should be lower, the seedbed should have enough base fertilizer, and the suitable growth temperature should be 22 ~ 30℃.
3. Crown grass: Crown grass, also known as Amazon sword grass, crown grass, etc. , is a large aquatic plant of Alisma of Alismataceae with stout petiole, wide leaves and beautiful leaves. The largest crown grass can grow nearly 100 leaves, the largest of which is 50 cm long and 8 cm wide. Known as the king of aquatic plants, it is suitable for growing in weak acid and neutral water, and likes warm and light. The water temperature should be above 24℃.
4. Iron crown: The iron crown is a pteridophyte of Polypodiaceae, with green leaves, 20-40 cm long, sporangium on the back of the leaves, strip-shaped rhizomes and black or dark brown adventitious roots below. Strong adaptability, easy management, often used for aquatic plant landscaping, but also can be planted on the water surface in high humidity environment. Because its leaves are tough and bitter, it is suitable for beautifying the aquarium with herbivorous fish.
5. Ceratophyllum: Ceratophyllum, also known as fine grass, fish grass, soft grass, pine algae, etc. It is a submerged plant of Ceratophyllum, a perennial herb of Ceratophyllaceae. It has extensive requirements for water temperature, but it is very sensitive to freezing. Freeze to death in the ice for a few days, like nitrogen, and the water has high inorganic nitrogen content and grows well. It can grow normally in water with pH value of 7. 1 ~ 9.2.