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is he in a bowl or filtered tank?
what is the water temp?
please give me 15 minutes to type answer
I am sorry Star is not himself.
Due to inbreeding Bettas have very weak immune systems leading to fin and tail rot.
Lethargy can be a sign of a few things and they are:
1) unfavorable water conditions
2) old age which for a betta would be anything 2+ years
3) disease
What I recommend be done is change 30% of the water in the tank using dechlorinated water that is the same temperature as the water already in the tank.
Verify that the water temperature is at the proper level for bettas which is 80f/26c degrees if not then slowly adjust it until it reaches the proper temperature.
Ammonia and nitrites must be zero
Nitrates 20 ppm or less.
PH 7
Aquarium salt should be added at the rate of one teaspoon per gallon of water in the tank. Salt can make a prolapse go back in, but it also helps with fin and tail rot.
The rot is usually caused bacteria, so we'll also need medication to eliminate them.
Kanaplex, furan 2 or Maracyn oxy
here are a couple of other things you can do to support the regrowth of healthy fin tissue. These are safe with the medications. One is a supplement called VitaChem, which you'd probably have to order online. Here is a reputable source.
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=4998
StressCoat (available in most pet stores) may also help. VitaChem and StressCoat can be used in conjunction with medicated food or medications in the water.
https://www.chewy.com/api-stress-coat-aquarium-water/dp/122094?utm_id=272255476&msclkid=e581ef57e7361e3369a4b1a9f38b994c&utm_source=bing&utm_medium=cpc&utm_campaign=Shopping-Product%20Targets-Consumables-NB&utm_term=4585307088206118&utm_content=Fish%20Water%20Conditioners
https://www.youtube.com/watch?v=1uGsQMNc5vw
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Kind regards,
Terri
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Ellen
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