Whoever told you that is silly! Of course certain plants will require special care, and those do require Co2. The bit about the air pump- I've got no idea what he's talking about. Many members around here grow their plants without co2 and all the fancy stuff. They usually just add nutrient supplements like fertilizer tabs, liquid fertilizer, or fish poop. ^Assuming there's an adequate amount of light. (If you wanna see what Co2 does, you can see umar's store in the classified section- everything is very vibrant and beautiful! I don't know any other examples of co2 users on the forums that has pictures up, sorry! :c )
The -least- caring plant I've encountered personally is anacharis. It literally just doesn't care what you give it (Speaking for myself, not sure about others experiences!). I have mine floating in a 5g on the floor with no nutrient supplements aside from fish poop. No dead leaves/depressed-plant-look at all. The only light it gets is the sun illuminating the room. Plus, it is very easy to propagate- cut off a bit a few inches long and add water. It grows suuuuper fast with med light/supplements c: I love it!
Amazon swords are nice, but they aren't really enjoyable to look at unless they're given root tabs, good substrate, and good lighting. Mine initially was at low lighting with no supplements, river rock substrate- it survived. However, it just looked.. sad. translucent leaves/no vibrant color.
Anubias are a great low light plant for me. All mine does is sit in a 1g near a window that is covered by a curtain. It just gets fish poop and is growing just fine. It's a very slow growing plant in general.
Wisteria is a fussy plant to me. It gets root tabs/ liquid ferts with med light and still doesn't want to grow pinnate for me unless it feels like it! It certainly will grow fine under low light settings, though I can't guarantee the type of growth you will get. I never tried attaching it to something, so I don't really have anything to say about that c:
I never really liked java ferns as the roots just started floating around all messy-like. Didn't want to trim them either because I'm lazy so I just have it floating in a 5g ( The same one on the floor, lol!) It's a good low light plant if you attach it to something.
^Just my opinions ^.^