Sounds like a combination of way too much light and not nearly enough CO2. A full tank pic would also help give a better idea what you're working with.
Speaking of which I took some pics for updates along with some close ups of the plants I've noticed stunting. As for CO2 I recently lowered it a tiny bit because it was coming out of the bubble counter at maybe a bit faster than 2 bubbles per second. I can see tons of micro bubbles in the tank. I have an inline ceramic diffuser thats on the output of my canister filter. I can up the CO2 again if necessary. I did lower the light cycle as previously stated. From what I can tell I think my ph is dropping 1 degree but not sure exactly I will test again this weekend. I do have a drop checker but I need to replace the solution in it. I'll do that this weekend as well.
slightly different angle this is a week or two old but figured I'd post it anyways.
Some pennywort showing transparent leaves and some curling.
pearl weed not sure if you can see the tops of this one curling and growing funny
more pearl weed growing not so well
anacharis growing much differently from before not sure you can see this one either
even the water wisteria seems to be struggling to grow...
Sadly enough no change in the alternanthera reineickii Since I got AR two months ago I haven't seen good growth in it and its covered in algae on the lower leaves.
Rotala Rotundifolias new growth isn't doing so well either.
Sorry for the picture overload!