Blenny Problem

Hello all, well i was watching my Sailfin Blenny when i noticed that only the left gil flaps were going in and out....what does this mean?

 

phew, i think hes ok now, using both gills now that i fed them, also how long does flake food last? i probably need to get some new food...;/

 

if only one gil moves, this could mean there is a lung problem. ive heard of this happening to sea horses and they do ok with only one lung. but they are more prone to problems this way.

 

I have heard of the lung problem also. Are your water parameters OK? what type of filtration are you using?

 

he seems fine now, my water specs r perfect and the filter is the bakpak 2, plus alot of rock and sand