You fish has Velvet or another protozoan disease.

Treatments:

Acraflavin

White spots which may  cover entire body, rubbing & scratching against the bottom?
Yes    No

Ich

 (Ichthyophthirius), a most serious disease. Almost all cultured fish are suseptable. NOTE : Some fish do not develop spots on the skin. Heavy infections may be on the gills and show no evidence of disease on other parts of the body.

Treatments:

Aquari-Sol, Quick Cure, MethyBlu

Worms, gill flukes, leaches, gyrodactylus, trichodina, multicellular external parasites or white spots on the body?
No

If yes . . .

Treatments:

Whitish tuffs of cotton-like material found on the fin, tail and body at sites of injury?
Yes    No

True Fungus

Treatments:

Acraflavin, Apicillex, MethyBlu

Grayish white stringy material covering most of the body, white or gray patches?

Body Fungus

Treatments:

Maracyn, BettaMax, MethyBlu, Ampicillex, Acraflavin

Appears sluggish, hiding, not eating or may have a swollen body or red spots, red streaks or bleeding on body area?
Yes    No

Bacterial infection
Does your fish have :

a swollen body with scales poking out like a pine cone? 

bleeding or red streaks on body?

Dropsy

Treatments:

Maracyn-Two, 

Internal Infection
(Septicemia)

Treatments:

Maracyn-Two, 

Fish's :

Gills are swollen?

Fins are torn or frayed?

Eyes may be cloudy, hazy or protruding?

Gill Disease

Treatments:

Maracyn-Two, Maracyn,

Popeye

Treatments:

Maracyn-Two, Maracyn,

Fin/Tail Rot

Treatments:

Maracyn-Two, Maracyn, BettaMax, Acraflavin, MethyBlu