I'm just wondering if anyone has used the salt water fat ika on natural lakes? Just wanted to know what the difference is compared with the Fat Ika sold for natural lakes.

I have used them in lakes and rivers with good success.  When I asked the GY representative what the difference was, they could not tell me anything other than the color scheme.  That is what drew me to them, is that they have the split colors, (dark body, chartruese skirt).  The other difference is they only come 5 to  pack, and they might be a little spendier.