Thank you Stinky,
i think that i know the problem i've got now, maybe not those i had before related to this topic, but here we go !
I think that my 3 plants in soil suffer from overwatering, because now, the leaves become to dry, brownish, and the soil is still wet. They don't need water, they don't consume water. Strange. How to get rid of this ? Let the soil dry with evaporation ?
Fhydro