Got on a sea weed discussion yesterday and got me thinking. For those of you who do feed dry sea weed. How long do you leave it in ur tank before pulling it out and replacing with new? I've always done 24 hours, I rubberband it to a rock. 24 hours later I take whatever isn't eaten and replace it. But now I'm wondering why? Why can't I just leave it another 24 hours? Or until its gone?