HELP!! beginner plant keeper and not going well..

The second photo has two Mondo grass plants (Ophiopogon). In the mid-background on the right is a Bacopa (not an Anacharis, which IIRC is an old name for several plants in the Egeria and Elodea genera). You are right that Bacopa is the only one which will flourish underwater.
 
one out of two isnt bad! lol. karlth, do u know wat kind of bacopa that is?

monnieri at a guess. It's actually also a bog plant, but one which will live indefinitely underwater. If it reaches the surface of an aquarium, it usually carries on growing ;)
 
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