I was given a 1994 Grecian swim spa that needed work. There was a lot of freeze damage so I replaced some plumbing, heater, the 2 speed pump and switched to digital controls. The Specht 4hp swim pump was ok. I added a Del high output ozonator, as I've been happy with ozone in my Tiger River spa.

Does anyone know what the shell material was on these? It has a different look and texture than my acrylic spa.

I could use some advice on whether to use chlorine or bromine as a sanitizer and also any opinions about SWG. I have a lot to learn about pools but I look forward to contributing what I can to the forum.