They looked natural and healthy to me, I always have the impression that the long leaves will tend to curl. And it is natural for many species of Cryptocoryne (including balansae) to have bullate leaves too if that worries you.
No, bullate leaves are actualy the reason why i chose that plant. The problem is because they not act as beckground plant in my tank. Leaves bending to the substrate, instead to grow upright, and stay hiden with midground.They looked natural and healthy to me, I always have the impression that the long leaves will tend to curl. And it is natural for many species of Cryptocoryne (including balansae) to have bullate leaves too if that worries you.
8 hourshow long is your light period
My tap water is very hard, probably with GH >20It looks like healthy growth to me. Calcium or magnesium deficiency usually dwarfs the leaves in addition to the deformation.