well, here's my $.02.
1 - I don't know... I agree, it doesn't look aquatic.
2 - I wonder if it is a nymphaea sp - I would leave it for a while to see what it does. This is kind of a bad pic of it, but it does show similar heart shaped leaves to yours, and the same rosette type shape with longer stems. http://www.aquaticplantcentral.com/...tails.php?id=109&category=genus&spec=Nymphaea
3 - I think is a form of Japanese Rush. This website says it is not aquatic, but I have had one in my tank for 4+ years and it has not died yet. Then again it certainly hasn't grown well either. http://animal-world.com/encyclo/fresh/plants/StemPlants/JapaneseRush.php
#1 is not an aquatic plant. Petco sells these to people all the time. It will die under water and foul your tank. Plant it in a planter and put it on your window sill.
#2 is hard to tell. Definitely not an anubias sp., the leaves are too soft looking. It does look aquatic though.
#3 also doesn't look aquatic. I'd bet money it's "mondo grass" and would be great as a sidewalk border outside.
As others have said, the first one is not aquatic, get it out of the tank.
The middle one is tricky expecially because the pic is blurry. Maybe Nuphar japonica (google it for pics), just based on the shape of that one leaf on the left. Check to see if it has a rhizome.
I think the second one is Cryptocoryne pontederiifolia Google image search it tho cus the pic was a lil hard to make out. I got 2 at my lfs the gentleman who sugested the for me said he gets tem from a man who propegates them, said they were rare
Sorry, I didn't mean to sound mean or anything, I just got to the point. Sorry if it came across wrong. Lysimachia nummularia is a stem plant, with smallish round leaves.