Hi
@RamboGringo I think that if there were PH variations that affected them to stay in that state they would already have several burns on the leaves. due to the withered aspect of the leaves, the substrate seems to be soaked too much, try to intervene more between waterings, let the substrate almost dry between waterings. controls watering by the weight of the pot, the substrate when it is dry becomes very light and when it is very wet it becomes very heavy. good luck mate 👍