Deck around a swim spa

by Bill
(Waterloo, Ontario)

I'm putting a swim spa into an inground concrete bunker and will build a deck around it. I have been advised to keep the deck joists a minimum of 6 inches away from the pool and the deck boards at least 2-3 inches away.

If I have my deck boards running lengthwise beside the pool (20 ft long), what is the best way for me to close that gap from the joist to the pool. Ideally, I would like to make the deck boards along the pool removable so I can get close to the pool and remove them when I have to access the pool panels but the supporting frame would also need to be removable.

I'm open to suggestions. I looked to see if there was some sort of molding I could use but I'm not having much luck on how to do this.

Thanks
Bill