Wavy leaves

I had a coupe do that and straighten out a day or two later, not sure exactly what it is tho, just growing ?

 

So, with new growth there is a waviness about them BUT leaves also tend to curl
When the ph of your water is off! Always water with ph in the 6s, and making sure the run off (water that comes come the bottom) is in the 6s as well, because that means that your soil is in the right ph as well!

 

It should be fine. pH is the likely culprit. You might want to begin checking pH. If you don't check or don't know much about pH it's a good way of learning about it, but as I said, at this point there is nothing that needs to be done here.