Mark, sorry to have diseminated BS, thanks for setting the record straight. Also, if I misattributed a quote, I'm truely sorry - please, no offence?
(Sean, if I've misquoted you, or have attributed a quote that you didn't make, to you - I hope I haven't offended you and ask your forgiveness) With the old stuff gone, I have to use my memory, unfortunately it's far from perfect - I'll try to be more diligent in noting when I'm 'quoting from memory' from now on. The other problem I see with 'memory quotes' is that I may have missed a rebuttal to what I quote (for instance if Mark had posted a similar one on the old forum), to the posts I was 'quoting' on the old thread - I gotta be more careful.
Haze, it probably won't get to the solid salt crystal point, there's a lot of dirt in those tracks, but that's kind of what you're looking at. Salt doesn't evaporate with the water, which is good, otherwise that essential (for life) mineral would be hard to come by (the only source that I can think of that might not be a result of ocean evaporation would be salt mines - but Idunno). So after GALLONS of salinated water were allowed to pool in one place long enough, you'd get crystals, so the track would have a very high salinity after a while, and as it builds up, it's abilty (and propensity) to rot the metal increases. Ain't it great to have your own chemistry expreiment in your backyard?
Not to wax too philisophical but, for every benifit there is a cost (or potential problem):
If you use trichlor, you get an easy to chlorinate pool, but you have to fight low pH and compensate for high cya
If you use bleach, you don't need so many adjustments for pH, but you have to go out and dose the pool every day
If you get married, you always have someone to share your life and a constant companion, but you can't go out and have a 'one nighter' with the cutie who is 'giving you the eye' in the supermarket checkout line
If you go to an Italian restaurant, you can order great lasagna, but can't get an eggroll with it. etc,etc...