amazon sword

I have a 65 gal tank with 4 angelfish 4 german blue rams and neon tetras its somewhat planted and was looking for some advice into pumping co2 my water parameters are all in 0 and as for PH it is at 7.6. Have some amazonian swords and baby tear mats but they seem to be having a bad time any...

In your opinion, is valisneria, pygmy chain sword and dwarf hair grass will look good together in a small aquarium? Or should I just stick to one? No other plants just the three. Thank you.