My betta is sick please help me?
my betta has velvet (oodinium) and maybe fin rot too, (not sore) and how do i cure it? i know that i should core the velvet with aquarium salt, butt how do i cure fin rot? and what's the difference of aquarium salt and normal salt? and do my other fish (armored catfish very small 4 cm long) that is in the same tank die if i use some medic to my betta if he has fin rot? and what happens if i use medic and he is not sick? butt if he has not fin rot, so why is his dorsal fin in two pieces (only on he top)? please answer, i don't want that he should die.