Hi there... I've read this forum for years and finally needed some help - and registered. Thank you. I'm on the Central Coast of CA and we have been the happy owners of a 1999 Sundance Calypso hot tub for probably a decade. I'd like to never get rid of it because it's hard to find a hot tub that lets you channel 2hp into a single jet. It loosens up any back, hip, shoulder, or neck pains I have - quickly. My wife would love to get this thing off of chlorine but I haven't give enough time to finding alternatives... Until then, thank you for the forum.