HOT TUBS: Calcium (and Bromine)

[waterbear]

Should have clairifed better....by indoor pool smell I meant choramines! He sold that house a few years back and now has an outdoor portable spa on bromine and a pool with a SWG.

[chem geek]

Boy, you sure know how to blow a theory right out of the water! Well, if it's chloramines then that means not achieving breakpoint and that's more like the problem Ben says that indoor pools have in general. Without sunlight and possibly good aeration, breakpoint doesn't happen as readily. Either that or there is something else going on we haven't yet figured out. If indoor pools and spas truly have a serious problem with chloramines, then the use of a maintenance dose of MPS would make sense since this oxidizes organics and ammonia really well and does so before chlorine gets a chance to form chloramines (and even some, but not all, chloramines get broken down from MPS according to my discussions with DuPont).

I just find it surprising that an indoor pool or spa without CYA has trouble achieving breakpoint as long as chlorine levels are sufficiently high. This is where the "real-world" butts heads with theory.

Richard