my danio has what i can see developing a red 'blood' face internally he/she is very quiet and was until recently sticking to the bottom of the tank..... then started floating and gently swimming round
i didnt notice its red face before (looks like its bleeding interally) just its face
whats going on
the other danio/fish are fine??!!??!??!
??
do i pu it in saltwater
?
just to add - water etc is perfectly normal!!!!!
i didnt notice its red face before (looks like its bleeding interally) just its face
whats going on


do i pu it in saltwater

just to add - water etc is perfectly normal!!!!!