Please help time is running out for my 2 clowns

[iAmARomeoSF]

I have posted regarding one previously and now am concerned about the other one as it too is now stuck in corner swimming vertically and will not eat and I'm sure his color will start to fade like the one that is worse off please tell me if there is something I can do to save these little guys my set up is a 12.8 gallon display tank with a 3.5 gallon sump other tank mates are seeming ok my royal gramma isn't eating much but the crab is fine and the sandsifter goby is seeming ok too... I attached videos of the clowns please take a look and give me some feedback. Oh and water parameters are all in the good/ok zone I even did a 60% water change and still they are declining in health

 

[vetteguy53081]

I have posted regarding one previously and now am concerned about the other one as it too is now stuck in corner swimming vertically and will not eat and I'm sure his color will start to fade like the one that is worse off please tell me if there is something I can do to save these little guys my set up is a 12.8 gallon display tank with a 3.5 gallon sump other tank mates are seeming ok my royal gramma isn't eating much but the crab is fine and the sandsifter goby is seeming ok too... I attached videos of the clowns please take a look and give me some feedback. Oh and water parameters are all in the good/ok zone I even did a 60% water change and still they are declining in health

Fish has labored breathing and with inverts doing well sort of rules out water and points to disease or condition but see no signs on the body thereby suggesting gill issue whether it be flukes which they rarely get or mucus which both not seen at first. I suggest adding air stone and consider adding ruby rally pro to tank which covers an array of clown issues

 

[iAmARomeoSF]

Both of my clowns are having the same issue now first it was just one now it's both but now that u mention it I have not seen any of my other fish aside from my other clown and the crab