Eleocharis parvula, commonly known as Dwarf Hairgrass, is a popular aquatic plant for aquariums. Here are the key details about its origin, light and water conditions, and how to plant it:

Origin

Origin: Eleocharis parvula is native to North America but is now found worldwide due to its widespread cultivation and distribution in the aquarium trade167.

Light Conditions

Lighting: Eleocharis parvula thrives under moderate to high lighting. Providing ample light encourages the plant to grow denser and spread faster, creating a more vibrant carpet. LED lights designed for planted aquariums are a great option12.

Water Conditions

Water Parameters:

• Temperature: Thrives in slightly acidic to neutral water with a temperature range of 68-78°F (20-26°C)1.
• CO2: While not strictly necessary, CO2 supplementation can enhance growth and promote denser carpeting1.
• Nutrients: Regular dosing of liquid fertilizers containing iron and other essential nutrients is recommended1.

How to Plant

Planting:

1. Prepare the Plant: If the plant comes in a tissue culture cup, peel off the lid and carefully remove the entire plant from the cup. Wash off the growth media in a bowl of water2.
2. Divide the Plant: Divide the plant into as many portions as necessary. Use aquascaping tweezers to handle the delicate roots and leaves2.
3. Planting in Substrate: Plant individual stems or small bunches a few inches apart to allow for spreading. This will help the plant form a solid mass over time14.
4. Substrate: Use a nutrient-rich substrate such as aquarium soil or fine gravel. Regular vacuuming of the carpet from excess organic waste is necessary to prevent algae and poor plant growth12.

Additional Tips

• Trimming: Regular trimming is essential to maintain the desired height and appearance of your Eleocharis parvula carpet. Trim the blades with aquascaping scissors, keeping them at a uniform height1.
• Patience: It may take a few weeks for Eleocharis parvula to establish and start carpeting, so be patient1.

• By following these guidelines, you can successfully plant and care for Eleocharis parvula in your aquarium, creating a stunning underwater carpet.