I purchased a silver arowana a couple weeks ago she’s been doing pretty good my Ropefish had gotten ich so I have been treating the tank since the other fish are in the tank aswell already my arowana recently started swimming in the top column but will randomly swim to the middle to lower column hang out there for a little and go back up to the top I also caught her scratching her side on the rock could this be because of the Ich or is this something else 
