W/o pics...? Leaves that severely hook/curl/claw under tend to be shock due to nute application. The dose can simply be too high, or the step-up just too fast. I feel radical pH shifts also contribute. Both are fundamentally stressing the plant into this behavior. I would reduce your mix by 50%, properly pH, & flush your medium by 3-4x the volume. Slowly step-up your nute levels from this. And, overwatering can contribute to odd growth too... again, no pics...? BTW, if you have horizontally twisting/contorting leaves, this is usually a strong indication of micro deficiencies... usually Zn, if I recall properly, though Ca also twists the leaves. Best.