I doubt it is the light being too low, I use a Doublebright and find it fine for everything except the highest light plants. Green Cabomba and it appears a Giant hygrophila are a little too needy. The dwarf Hygrophilia is thriving, and then some. How long are your lights on each day?
Something is out of whack but you've two problems. Shrivelling plants and the growth.
Originally Posted by prestono2014
My parameters are perfect for my area.
...but what are they and what does perfect for your area mean? Soft water might cause the plant issue.
The growth looks green in the picks but you said white... Is it, in fact, white and not green?
If the plants are not doing well, for whatever reason, the growth can take off due to an abundance of nutrients that the plants are not using. Probably should cut the fertilization until you figure out what's up... It may be compounding the growth issue.
I looked at your tank in your profile, nice looking tank. One thing that can help with higher light plants is to offset the fixture and specifically plant them directly under the more focused areas under the bulbs. I setup a shade side and a bright side, java fern and crypts in the shade and everything else in the light.
You could have put the tetras in the tank right after the plants. The fish produce ammonia and CO2 which would help the plants. Mine took off each time I added new fish.