Name: Ceratopteris thalictroides
Origin: Tropical Regions
One of the most successful plants I've grown. If CO2 is offered it will over run the tank. A great plant for removing excess nutrients in the water, new 'leaves' unfurl from the base of the plant into lacy fronds and then slowly die off over a fortnight, then new plants form off the dying leaves. Needs to be trimmed off every fortnight to keep tidy.
This is a great plant for filling up an empty space! However, it tends to overshadow your smaller plants so be sure to not put it anywhere you need strong light for plants it will cover. My Betta absolutely adores his water sprite and lingers in the leaves, often resting on the plant. Will grow with little or as much light as possible.
I had put Water Sprite into my 200 L tank and my fish thought that it was a smorgasbord. It makes a beautiful addition and was easy maintain until they had eaten clear to the roots.
This is a wonderful fast growing plant, that can be used also to cast shadow on the aquarium when floating, though it can be planted in the gravel. One important thing to remember is that snails love this plant's leaves and can disappear with a whole plant within' several days. For all those that raise Anabantids, this is a perfect plant for you!
I used to attempt keeping this plant, but no longer. I've read, and been told, that this plant is easy to grow, and is very hardy. I keep many plant species sucessfully, but this is one plant that refuses to grow for me at all. It makes a huge mess, and my tank looks like I used it to rinse a salad.
I have two of these plants in a 400 liter tank. The one at the end farthest from the filter's spray bar grows fast, with thick stems. Its leaves reach all the way to the top and spread widely on the surface. The other plant is in the jets of water from the spray bar and it grows much more slowly. It has thinner, more flexible stems that bend in the fast current.