[Plants struggling]

Why is my jungle val not thriving when I first got it. it sent out runners then stopped and seems to fall apart faster than it grows same as my Amazon sword grew like a weed the bam slowed down leaves are not as solid of a green I use root tabs and easy green and have a finnex 24/7 hlc my nitrates sit around 25-50ppm it's been running about 6 months 

[Glass tanks]

I've noticed that my 2 tanks 29 and 40 gallon breeder both front and back glass bow about 1/8" the 29 is worse than the 40 is this normal? I've had people say yes and no a read both yes and no