My brother in law has inherited a house with a spa, and from the looks of it, it is bromine based. Is this good for sanitation?
Also, there are some oxy type chems and some anti foaming chemicals he got, are these really necessary? Can I just get him going on BBB for the spa? Is it ok to just switch over to chlorine from bromine? Should we do a drain and refill first, I almost wouldn't mind doing that just to start over with the water.