How often do you feed it and what are you feeding it? Get it out to where there's flow. Light isn't so important, but flow, IMO, is very important as is placing it in a spot where you can target feed it easily.
I don't think it's dead, as I don't see the orange tissue receding, it's just really thin.
So you get an idea for the amount of flow... My suns
See, how fast the flow is? And I've added even
more since that video.