I recently boought a Caldera Vacanza Vanto. I am thinking of converting to Salt Water (in-line) but I am not sure if it is safe to do so (the Vacanza series does not come with salt water as an option). I have read that not all hot tups can be converted (something to do with salt corroding the pumps and other equipment if they were not made with salt water as an option). On the other hand, I have read of people that converted hot tubs from way before Salt Water was a thing for hot tubs and they have never had a problem. Could anyone shed some light on whether it is safe to do a salt water conversion based on the equipment that comes with the Caldera Vacanza series? Thanks in advance!