The red plant seems to be Myriophyllum tuberculatum.
Although beautiful, this aquarium does lack some depth and appears a little 'flat.' It can be even more beautiful by letting the groupings on the sides fill out a little taller and a little more toward the front --that'll give it the depth and perspective it needs! Those driftwood branches are perfectly placed for a concave presentation with a slightly off center 'tunnel' that looks in toward the back.
Carlos