Name: Pogostemon Helferi Care Level: Moderate Recommended Substrate: Rich nutrient substrate or aquasoil Recommended Lighting: Moderate to high lighting Recommended Temperature: 72°F to 82°F (22°C to 28°C) Max Height: 3-4 inches (7-10 cm) Foreground, Midground, or Background? : Foreground to Midground Need CO2? : It can grow without supplemental CO2, but CO2 injection may promote faster and denser growth. Fun Fact: Pogostemon Helferi, also known as "Downoi", is a unique and attractive foreground plant in the aquarium hobby. It is characterized by its curly and crinkled leaves, which form small, compact clusters resembling a mini forest. Pogostemon Helferi is native to Thailand and was first discovered in the late 1980s. It requires good lighting and a nutrient-rich substrate to thrive and develop its distinctive form. Its compact growth habit makes it suitable for creating a lush carpet effect in the foreground of the aquarium. Pogostemon Helferi is a relatively slow-growing plant, but with proper care and maintenance, it can form dense clusters, providing a visually appealing landscape in the aquarium.