Hey, with your leaves there may be a few things. 1. Leafs curling up can be a sign of a Magnesium deficiency or a sign that you are peeking your newts to the max. Leaves curling down also may be a newt deficiency or a newt lock out if your PH is to high or to low in the water your using. You may also have a salt build up. Heat, newt burn or lock outs. Think about all of these things. Also, if you are using a pre mix soil, it may have some time release furts that are burning your plants, or like I said, maybe causing a salt build up. Maybe try running a couple gallons of water thru your pots or taking them to a sink and running them under the foset until you get a good amount of water running threw.
Get a few more opinions that may confirm or unconfirm what I'm talking on, that's what I try to do. Adieu