This is my first post to this forum, but I have been reading it since we got our betta fish August of 2012. We didn't know it when we bought him that he was very sick, and we have been through almost every parasite, fungus, bacterial infection there is. Through reading here he has lived a very happy life for 1 1/2 years. However he is very sick now. He has been swollen for about a month and I think he was being overfed. We have since stopped feeding him as much, and he seemed to get better, although the swelling never completely went away. The last few day he has been laying at the bottom of the tank, very swollen, has labored breathing, and now is losing scales. I have given him 1 epsom salt bath, but then I was concerned it was too stressful for him. The last two days I have been putting maracyn oxy in the tank, with no results. He is getting worse. Tonight, I started tetracycline because it dawned on me the swelling may be a bacterial infection (It's the only antibiotic I have and we are snowed/iced in here in the South!). I would like advice if there is something I am missing. I have left him in his 10 gal tank and turned the filter off. Thanks in advance! Sorry to make this so long. 
Housing tank
What size is your tank?10 gal
What temperature is your tank? 78
Does your tank have a filter? yes
Does your tank have an air stone or other type of aeration? no
Is your tank heated? yes
What tank mates does your betta fish live with? none
Food
What type of food do you feed your betta fish? omega flakes
How often do you feed your betta fish? last month- 1 flake
Maintenance
How often do you perform a water change? avg. of every other week
What percentage of the water do you change when you perform a water change? 25%
What type of additives do you add to the water when you perform a water change? Prime and aquarium salt
Water Parameters:
Have you tested your water? If so, what are the following parameters?
I use Mardel 5 in 1 test
Ammonia:safe
Nitrate:safe
pH: ideal range
Hardness:moderate
Alkalinity: ideal range
Symptoms and Treatment swollen belly (no coning), labored breathing, losing scales
How has your betta fish's appearance changed? starting to lose scales
How has your betta fish's behavior changed? laying at bottom of tank several days, labored breathing.
When did you start noticing the symptoms? swollen-1 month, others symptoms last couple of days
Have you started treating your fish? If so, how? maracyn oxy 2 days, tetracycline today
Does your fish have any history of being ill? has had illnesses off and on
How old is your fish (approximately)? 1 1/2 years
Housing tank
What size is your tank?10 gal
What temperature is your tank? 78
Does your tank have a filter? yes
Does your tank have an air stone or other type of aeration? no
Is your tank heated? yes
What tank mates does your betta fish live with? none
Food
What type of food do you feed your betta fish? omega flakes
How often do you feed your betta fish? last month- 1 flake
Maintenance
How often do you perform a water change? avg. of every other week
What percentage of the water do you change when you perform a water change? 25%
What type of additives do you add to the water when you perform a water change? Prime and aquarium salt
Water Parameters:
Have you tested your water? If so, what are the following parameters?
I use Mardel 5 in 1 test
Ammonia:safe
Nitrate:safe
pH: ideal range
Hardness:moderate
Alkalinity: ideal range
Symptoms and Treatment swollen belly (no coning), labored breathing, losing scales
How has your betta fish's appearance changed? starting to lose scales
How has your betta fish's behavior changed? laying at bottom of tank several days, labored breathing.
When did you start noticing the symptoms? swollen-1 month, others symptoms last couple of days
Have you started treating your fish? If so, how? maracyn oxy 2 days, tetracycline today
Does your fish have any history of being ill? has had illnesses off and on
How old is your fish (approximately)? 1 1/2 years
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