PlantFiles: Anacharis, American Frog's Bit, Brazilian Elodea, Waterweed, Planchon
Egeria densa

FYI: Egeria densa/ Brazilian Elodea is a Class A Noxious weed in Vermont. The importation, movement, sale, possession, cultivation and/or distributions is prohibited with fines upto $1000.00 possible

I have grown anacharis for about 35 years. I have grown it in aquariums and outside ponds. It does best outside in full sun. Mine has winter over in zone 5 with little or no damage, as long as the pond does not freeze to the bottom. Some is left floating on the top of the water, other I have planted into 5 gallon bucket. I use peat moss on the bottom 1/4 of the bucket, follow by a good potting soil to within about 4" of the top. You must put at least 3-4" of sand on top to prevent the peat and potting soil from floating. Break off 8" or longer stem, make a hole with finger or stick 3-4" deep and place the broked end in the hole and gently press the dirt around the stem. You can also just let it float on top of the water.

Egeria densa is a good plant for beginners, and its rapid growth helps create a balance in the aquarium from the start. It can also help prevent algae because it absorbs a great number of nutrients from the water. The plant secretes antibiotic substances which can help prevent blue-green algae (a type of bacteria). The growth rate depends largely on the amount of light and nutrition available. Growth does not stop in unfavourable conditions, but the plant turns light in colour and the tendrils grow thin.