Assuming you have the compounds that cause off-flavors in your water then bringing more of it is of course not a good idea. You want fresh clean water to remove off-flavor, but please understand you may NOT have any off-flavor to begin with... this is not something that will ALWAYS happen. That's why so many folks argue about tilapia not tasting muddy and others swear by it whereas even others realize they can get a better taste by purging the fish.Originally Posted by chrisfoerst