i see, well, to be honest...unless you have the ability and discipline to go out, TAKE THE SEAT OFF, and check it EVERY DAY, it's a bad idea...
mine wasn't even in the water..it was on a concrete boat ramp, at least ten feet from the water....and i STILL was paranoid driving to work every morning, wondering if today was the day my hull was flooded...
and sure enough, took it out one day, was beat up from the sun and was lazy, so i didnt pull it ALL the way up the ramp as i usually did, tied it off, didnt fog it or clean it at all (p.s., i do that EVERY TIME I RIDE NOW), and just tied the front up to a concrete anchor...
sure enough, came back not even 12 hrs later(the next morning) and my ski was filled to spark plugs with salt water...
electrolysis occured and ate thru alotta stuff...
just not worth it...