RBTA ISSUES after filter change

[kevNnic]

Well it appears my poor RBTA is unhappy with my most recent filter change, i had to remove all my media and change filters in my canister and i do not think my RBTA is happy about it. Over the past couple weeks he has not been fully inflated like he used to be. Im going to try another waterchange and see if i can get him eating, I haven't changed anything to do with flow and this RBTA has seemed quite happy for the past year. What else can i do to make sure i do not lose him. He spilt about 4 months ago and i lost both of his twins.

any info or feedback would be greatly appreciated. everyone else in the tank is doing fine.