I have seen deformed leaves (crinkled and misshapen) due to metal toxicity. It happened when I tried to grow my Ludwigia in subsoil. Subsoils do not have enough organic matter to bind and neutralize heavy metals like iron, copper, manganese, zinc, etc.
Possibly, could be a nutrient deficiency but if you've got soil and fishfood, my guess is the plant has plenty of nutrients.
Excess sodium will also cause bizarre symptoms.
Possibly, could be a nutrient deficiency but if you've got soil and fishfood, my guess is the plant has plenty of nutrients.
Excess sodium will also cause bizarre symptoms.