Leaf Curl on Water Oak Sprite

Curling leaves can be a sign of nutrient deficiency. What is your light level and are you dosing any ferts or using and root supplements?
 
My light has 4-54watt T5s, I'm using a DIY CO2, and just started the EI this week. I was using Flourish twice a week. I have 3" of flourite under the sand. My tank is a 55 gal long
 
Follow the EI method and you should see amazing growth. I have a 50g tank with a similar light setup, I had to cut back to 2 bulbs because the plants were growing too fast.
 
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