Hi,
I will let those who put salt in their water definitively answer the questions about the steel frame, but my thinking is that if it's a liner pool, then the salt water will not come into contact with the frame because the liner will be between the water and the steel, so corrosion of the frame shouldn't be an issue. However, I don't put salt in my pool, and there are others on the forum who have much more experience with that, so I'll let them address that question. I would guess that your pool supplier also sells the Nature 2 system and does not sell SWCGs, so that may influence their advice a bit, too.There are many people who add salt to their pools without using as SWCG, because they like the "feel" of the water. In these cases they are not adding as much to the water as you would if you were generating chlorine from it. Others use salt in the pools because they are using an SWCG to generate the chlorine from it, rather than adding chlorine manually. Either way, one thing I would definitely check if you decide to go with the steel framed pool is if salt systems are specifically mentioned in the warranty section. If it will void your warranty, even if the manufacturers really don't understand anything about pool chemistry, then you'll want to avoid it anyway.
I will tell you that the Nature 2 is a complete waste of money if you're trying to get away from a chlorine pool--you still have to maintain low levels of chlorine to keep the pool clean, and the nature 2 adds large enough quantities of metals to make fighting staining a real nightmare, which you don't want in a new pool. Do yourself a favor and stay away from it.
I'm curious--the statement you made that, "......how I can get a system setup so that I can control the things like skin dryness, burning eyes and damaged swimsuits." makes me question if why you want the salt to begin with. Chlorine pools don't produce dryness, burning eyes, or damaged swimsuits, if they are maintained properly, whether it's chlorine generated from a SWCG system or added via bleach or some other source. If you keep too high a chlorine level, it can dry skin or fade suits, but it's got to be WAY high before that's going to happen. And as far as irritated eyes go, that's usually blamed on chlorine, but in reality is caused by combined chloramines, which form when the pool is inadequately chlorinated. Another common cause for eye irritation is letting the pH get too low. Basically, keeping your chemical levels where they need to be is all you need to do to keep your pool comfortable and clean enough to swim in, and it's really not hard or time-consuming to do if you have a good test kit and understand what you're doing, which we can certainly help you with.
Don't know if this helps or not, but just wanted to throw it out there....
Janet
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