Guppy Grass - Najas Floating Plant.
Really Good Portion!! 
 
Light Requirements
Anyone who has guppy grass in their aquarium needs to make sure it gets enough light on a daily basis. This type of grass needs a high degree of light if you want it to appear vibrant and bright green.
Make sure that this plant gets 8-12 hours of light every single day for the best growth results. Keep in mind that an excessively high level of light can actually burn guppy grass. It is important that you find the right balance to keep this plant healthy and looking great.
 
Water Conditions
It is best to keep guppy grass in water that has a pH range of 6.0 to 7.0, and a hardness rating of 2 to 25 Dkh. The water should be kept at a temperature of 50 to 86 degrees Fahrenheit—it doesn’t do well in very warm or cold water. This grass isn’t incredibly fragile or delicate, but you will need to keep this information in mind when setting up your aquarium. Medium water flow is best for this grass, as it encourages normal growth. You also won’t have to worry about any of the grass clogging up your filter, which can cause major problems in your tank. If your fish require fast moving water, this plant is probably not a good choice.
 
Guppy Grass Planting vs. Floating
You will have the option of planting your guppy grass, or simply letting it float. The appearance of the leaves varies depending on how you grow it. This means that the leaves will look different if you plant it versus letting it float. Because fish don’t tend to feed on this plant, you should be able to let it float without any issues whatsoever. If you decide to plant this grass, you’ll want to keep in mind that it can break up in lots of small pieces. While there is no guarantee that this is going to happen, you are still taking your chances.