racialfish

So on my 55 gallon I now have approx. 3.8 wpg. I currenty Inject co2 by a hagen ladder and the ferts I have been dosing are seachem flourish. I have been dosing it about 2-3 times a week and so far my plants seem to be doing fine and growing rather fast. I currently have the following plants:
Ludwigia repens(grows like a weed)
Melon sword
Amazon sword
apogenaton, don't know which species
Red crypts
green wenditti crypts
java fern
java moss
marsilea quadrifolia
pygmy chain sword
anubias nana
cabomba
and some duckweed and native floating plants
They are all growing rather well IM, so should I buy the watson ferts or b/c most of these plants are lowlight do you think it will be fine?