My Sundance doesn't have your filtering system. But it's my understanding that this filter is disposable, so you don't clean it, just replace.
If you want to replace the filter at 6 months, go ahead.
You're the best judge of when it needs replacing.
Others have reported a 9 month or so life out of this filter, I suppose it all depends on your water and usage habbits.
What's it say about the subject in your owners manual?