One of my vics stopped eating yesterday and seemed sick and lazy just laying in same spot. This morning I thought he was dead but he wasn't. I gave him salt bath and few hours later he seemed a little better but still not swimming unless I annoy or scare him into doing so. Water params good he's not being bothered. Only thing I do notice is he moved his mouth around almost like a holding female randomly but his gills are not moving rapidly. Any ideas?