I was looking closely at my tank today and noticed that what making it cloudy is the sand my fish keep stirring it up and little particles dnt settle what should I do
Yes for this purpose. The socks will help the most though. It's a slow process because the fish will keep kicking up fine particles. I hated my diamond goby for a while because of this.
You can use a zip tie for the ones with the rings and attach it to your drain pipe.
As far as in a bag, passive filtering like that wont filter out particles (much). It's ok though not the best for dissolved pollutants your trying to remove.