I brought 4 sterbai corydoras yesterday and they seem to be hiding and not moving much. I also dropped a few pallets infront of them and they wouldn't eat. Ive tried froozen bloodworms aswel but no luck. Is it just because they havent settled in yet? Ive got 6 neons and 1 betta in a 18 gallon. My other fish.did this also but they have settled now and are.happy