Whats Wrong With My Cherry Barb

[Deedie]

already posted this in the general discussion, hadnt realised it would be more appropriate in this setion. so my apologies for a double post

over the last few days one of my cherry barbs has developed a big lump that is sticking out under neith it. it is also acting like it is "breathing" heavily and rapid. it is also just staying very low in the tank and hasnt moved from one corner of the tank in days.

any ideas??

or if anybody needs any other info then let me know

 

[WILDER]

What are your water stats in ammonia, nitrite, nitrate, and ph.
When lumps suddenly appear they usually bacterial.
Is the lump hard or soft like filled with fluids.
Not good once they heavy breath.