I've got her close to a power head that is pointed at her to hopefully help with flow, but yes I think daily freshening her water will be good.You might consider dumping out the water every day since there is no flow through the bowel. I think you already had feed her some but giving her a little piece of shrimp (very small amount) daily or every other day should keep her fed.
I've been offering her small pieces of some fresh wild caught shrimp every now and then. Usually every other day or so seems to be her preference. I also have an extra mushroom Coral I put in with her as a monitor for myself as well on water quality.
Hopefully this will help little Ripley. She has been hanging onto shells as shields against the starfish.