Downsides to salt pools

[chem geek]

Since I have very high CH fill water, I am planning a refill soon while the CH is at it's lowest. This gives me another opportunity to repeat the same experiment and see if I get different results this time.

Mark,

I remember when you posted these results before and waterbear commented how the largest gain was seen approaching 80 ppm CYA so if you do your experiment be sure to get the CYA up to that high a level. That would be a good test, especially if your SWG manufacturer is one of the ones that recommends the 70-80 ppm CYA level. We can then put this issue to rest one way or the other (and I'll apologize to gunslinger who's NY skepticism may have been correct; and to PoolSean) -- it's an important issue since it would be easy for us to recommend lowering the CYA to the more "normal" levels closer to 30 ppm for most pools which would give more disinfecting chlorine at the 3 ppm FC level (probably enough to keep away mustard/yellow algae which one user on this forum couldn't keep away without 5-6 ppm FC in his high CYA SWG pool). I just didn't want to recommend that if it had a negative effect on efficiency.

Thanks,
Richard