Sadly the red on the fins sounds like septicemia and the body and fins sound like columnaris especially around he mouth area.
Not the writer of this information below.
Columnaris (a.k.a. Mouth Fungus)
Symptoms:
An infected fish will have off-white to gray cotton-like patches on the head, fins, gills, body and particularly the mouth. In time, these areas will develop into open sores. Gill swelling may occur, gill filaments may stick together and excessive mucus may develop in the gill area. Rapid breathing can be seen. Fins may deteriorate to the point of leaving the fin rays bare. Muscles may be inflamed and capillaries may rupture. Fish, particularly livebearers, may exhibit "shimmying". Infection may be acute (killing an infected fish within hours), or chronic (lingering for several days before eventually killing the fish). As with most diseases, not all symptoms need be present.
Cause:
The bacterium Flexibacter columnaris.
Treatment:
Ensure that your water conditions (e.g., Ammonia, Nitrite, pH, Nitrate levels, and water temp.) are within their proper ranges. If not, perform a water change and/or treat the water accordingly. Recommended medications include: Furanace, Fungus Eliminator, Fungus Cure, Furacyn, Furan-2, Triple Sulfa, E.M. Tablets, Tetracycline, or Potassium Permanganate. Medicated foods are also recommended. Columnaris can be highly infectious and may quickly kill all aquarium inhabitants; therefore, early treatment is essential. All fish, including those not yet showing visible symptoms, as well as the aquarium they inhabit should be treated.
Not the writer of this information below.
Septicemia
Symptoms:
Fish may have reddening at fin bases, blood streaks throughout the fins and body, small hemorrhages around the eyes. Dull listless behavior and lack of appetite may also be present.
Cause:
Systemic bacterial infection caused by various bacteria, including Aeromonas, Pseudomonas and Vibrio. The illness is often brought on by poor water quality or as a result of parasitic infestations or other infections. These bacteria enter the blood stream and circulate through the tissues causing inflammation and damage. Inflamed blood vessels in the skin and at fin bases stand out. Blood vessel and heart tissue damage cause hemorrhaging and consequently leakage of body fluids into the abdomen, which may lead to Dropsy.
Treatment:
Water conditions must be improved for all fish in the tank, regardless of how many fish are infected. Check your water’s Treat with Kanacyn or Tetracycline as well as with a medicated food if the fish will eat. If parasites are suspected, all the fish in the tank should be treated with antiparasitic medication. Using salt to help restore osmotic balance might be helpful.
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