What are your levels of
Temperature of the water?
Water change schedule,
how much water changed and
I would get a couple of pwc
's done asap - one today and one tomorrow. Any time there is a possible issue that is a good first step. If you have any unsafe levels in the tank, do another pwc
right away to get the water safe.
Bulging eye usually indicates poor water conditions, or infection.
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves