Acidosis

Alkalosis

Ammonia Poisoning

Anchor Worm

Apiosoma

Argulus

Beetles

Black Patches

Black Spot

Blister Disease (see Myxosporidiosis)

Blood Parasites

Branchiomycosis

Camallanus

Cauliflower Disease (see Lymphocystis)

Chilodonella

Coccidiosis

Columnaris

Costia

Cryptobiosis

Dermocystidium

Discus Plague

Dropsy

Epistylis

Ergasilus

Exophthalmia

Eye Cloud (see Eye Flukes)

Eye Flukes

Fin Rot

Fish Lice (see Argulus)

Fish Pox

Fungal Infections

Furunculosis

Gas Bubble Disease

Gill Flukes

Gill Maggots

Gill Rot

Glochidial Infestation

Glossatella (see Apiosoma)

Glugea

Guppy Disease

Hamburger Gill Disease (see Proliferative Gill Disease)

Head & Lateral Line Erosion

Henneguya (see Myxosporidiosis)

Hexamita

Hole-In-The-Head (see Hexamita)

Hydra

Ich

Leeches

Lernaea (see Anchor Worm)

Lymphocystis

Malawi Bloat (see Dropsy)

Mites

Mouth Fungus (see Columnaris)

Myxospora (see Whirling Disease)

Myxosporidiosis

Neon Tetra Disease (see Pleistophora)

Nitrite Poisoning

Nodular Disease

Nutritional Problems

Oodinium

Oxygen Deficiency

Piscine Tuberculosis

Pleistophora

Proliferative Gill Disease

Pop-Eye (see Exophthalmia)

Red Sore Disease (see Epistylis)

Rockitis

Rust (see Oodinium)

Saprolegniasis

Septicemia

Shimmies

Skin Flukes

Swim Bladder Disorder

Trichodina

Tumors

Ulcer Disease

Velvet (see Oodinium)

Vibriosis

Wasting Disease (see Piscine Tuberculosis)

Whirling Disease

White Spot (see Ich)

Worms in the body cavity

Worms in the intestine

Yellow Grub