Planted Tank Guru
Join Date: Feb 2010
Location: Newbury Park, CA
Probably because the plant in the front is so full.
I would be plotting a new scape now that there is a lot of plant mass and can see how things grew out. I never leave well enough alone.
Swords are beautiful plants, easy and fast but over grow most any tank. My 150 gallon tank was half filled with one rose sword. One single crowned plant. Keep them to the sides in the middle so you can enjoy a little of the natural grace and pull off the oldest leaves to attempt to keep them in check. Some aquarists have tried root pruning to limit growth but since aquatic plants get lots of nutrients from leaves rather than roots probably doesn't work all that well.
Those lilies are tank busters as well. Soon they will be sending up aerial leaves that float and will block all the light to the other plants. Watch for new leaves that come out green on top and have really strong veining on the bottom. They are the culprits, go ahead and see how one develops if you like but snip out any new ones you see.