it was about 5 days ago with nothing in the tank but guppies tetras and ghost shrimp. i did one today. about 20% seems fine. swimming as usual. hopefully he wont be like that tomorrow morning. im assuming it was the stress of being transported.
It's new to it's enviroment and may be feeling the stress in there thus behaving like this? Give it some time to get use to it's tank and as it grow it will become more brave in exploring the tank.
This is great. Continue to practise only feeding time then you will visit the tank and it will make the fish very willing to come to the front to greet you in the future.