my female fh's belly looks like its gonna burst open but sh has been like this for a few months i thought it would just go away in time but its stil like this she eats good and has no problem swiming around i change the water maybe 40-75% every 2 weeks sometimes 3weeks i even tried the epson salt i put her in my emergency tank and put 2 handfuls in the tank she let out some dropings but nothings changed she still looks like her belly is gonna pop what should i do or what can i do????