okay man all you have here is just some nutrient deficiency.
For the one with the leafs curling over: you have a Magniesium deficiency, this is easily treated using Epsom salts (MgSO4) at the rate of 1 tablespoon per gallon of water.
for the leafs curling under: you have either a (K) or potassium deficiency or a (CU) deficiency, more than likely its just over fertilized. (K) deficiency can be treated with any high-K fertilizer. Cu deficiencies are rare and mimic symptoms of overfertilization. A fungicide, copper sulfate, (CuSO$) can be used as a foliar spray to relieve the deficiency.

hope my advice can help you, i have a major in biology/chemistry and ive been growing hydro for some time now, so this should help you, if you dont know much about the lingo just write it down and go into you local grow shop, they should be able to help you...

peace :rasta: :rasta: :rasta: