i have a silver aro, about 7-8 in. just recently he started acting really skittish. I cant approach the tank to feed him without him darting for cover. he still eats, not as much as he was before though. he wasnt like this until 3 days ago. did a 25% water change. and the water parameters appear fine. Is anything wrong with him or is this a phase kinda thing for silvers? any info would be great.thanks!