Oh, and.....

"Mine sprouts green then turns brownish after a few days. I can shake
this
plant and brown stuff flies off."

Not saying this IS the case, but don't be fooled. A huge problem (IN
MINE) especially with the finer leafed plants, is that "stuff" floating
around in your water gets trapped within the leaves. The "stuff" builds
up enough to seriously hinder photosynthesis and the plant...... I
suppose the term "belly-up" wouldn't really work here would it? Lack
of maintenance maybe, but my tank needs more circulation to keep the
stuff suspended in the water, so the filter can pick it up..... Later!