WillC said:It may be nothing more than some of the older leaves just naturally drooping due to age and gravity. The new leaves look healthy so overwatering is not likely a problem. Underwatering may be contributing to the drooping. Water it thoroughly as soon as the surface of the soil is just barely damp. That may be more than once every 7 days.
plantladylin said:Does the pot that your Fishbone Prayer Plant (Ctenanthe burle-marxii) is growing in have drainage holes in the bottom? If not, the water is likely pooling at the bottom of the container, depleting oxygen around the roots and causing rot.