I bought used fluorite that was already rinsed before he put it in his tank.
He rinsed it before he sold it to me, I rinsed it for about a hour before putting it in my tank and I still had cloudy water for about a day or so..
Not sure how people are buying new stuff and rinsed it a little bit and not getting any cloudy water at all..? I was even running EMP-400 in a 29 gallon tank to help clear up my water..