lionfish help

[dengnath]

Hello just bought my lionfish 2 days ago. He is about three inches long. Since i have got him i have fed him 3 guppies. He was looking good till tonight he was laying on the botton kind of leaning one way. He seems to be breathing and opening his mouth alot bu i cannot tell if it is normal or not. Any suggestions would be appreciated.

 

[Johnly]

You need to post all water parameters and system info for us to begin to help:_)
Maintenance regime too:_)