[BlueBettaFlo]

My female dumbo betta has lost her appetite for about a week.
I looked at her, but there are no signs of velvet and any other disease. her fin looks completely fine either. she's completely healthy in appearance.

she lives in 5 gallon tank, together with 2 other female betta (i think it's okay since they are still 2 months old) but the other two looks fine, and they are really active.
yesterday i try to do 50% water change, because i was afraid she poisoned by ammonia. but nothing change.
even worse: she gets very weak, and just lying in the bottom of the tank. she doesn't swim much, and just do it to take a breath in the surface.

here's a pic of her

Housing
What size is your tank? 5gal
What temperature is your tank? 78
Does your tank have a filter? No
Does your tank have an air stone or other type of aeration? No
Is your tank heated? No (i live in tropical country)
What tank mates does your betta fish live with? two female betta fish (2 months old)

Food
What type of food do you feed your betta fish? Sera Betta Bit
How often do you feed your betta fish? Twice a day

Maintenance
How often do you perform a water change? Biweekly
What percentage of the water do you change when you perform a water change? 50%
What type of additives do you add to the water when you perform a water change? water conditioner

Water Parameters:
Have you tested your water? If so, what are the following parameters? Not lately, but last time everything was perfect.

Ammonia:
Nitrite:
Nitrate:
pH:
Hardness:
Alkalinity:

Symptoms and Treatment
How has your betta fish's appearance changed? nothing
How has your betta fish's behavior changed? she's been very weak
When did you start noticing the symptoms? It's been about 7 days
Have you started treating your fish? If so, how? N/A
Does your fish have any history of being ill? Nope
How old is your fish (approximately)? approx. 1 months of ownership

anyone, please help. i really don't wanna lose mirine :'(

 

[Olympia]

Hmm, they may seem okay with you around but fish act different when they know we're watching, usually waiting for food. It's quite possible that the other fish picked on her so much that now she's weak. She might be scared of the other fish, and just be staying at the bottom away from them.. I'd probably start by separating all the girls.
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[BlueBettaFlo]

Hmm, they may seem okay with you around but fish act different when they know we're watching, usually waiting for food. It's quite possible that the other fish picked on her so much that now she's weak. She might be scared of the other fish, and just be staying at the bottom away from them.. I'd probably start by separating all the girls.
Posted via Mobile Device

Actually I keep her for about a month, and everything looks just fine till a week ago. She eats and swim normally back then, and get along with the other girls. I'm sure she's not the shy type either :-?

but thank you for the advice!
maybe I'll try to keep her in a different tank, then see her reaction ;-)

 

[Pataflafla]

Try that and maybe more water changes. Biweekly with 3 bettas in a 5 gallon is pretty little.

Maybe try out once a week to see if that helps out anymore as well. You could always quarantine her and do 100% daily changes to see if she perks up at all.The best treatment for illness is clean water and good food.

 

[lvandert]

From what I've read on here 3 girls in a 5 gallon is a bad idea. A sorority needs at least 4-5+ females. If you take your girl out separate the other two, they will fight. and a 5 gallon really isn't the best size. Here's the sticky on sororities http://www.bettafish.com/showthread.php?t=29402&highlight=sororities

 

[BlueBettaFlo]

Try that and maybe more water changes. Biweekly with 3 bettas in a 5 gallon is pretty little.

Maybe try out once a week to see if that helps out anymore as well. You could always quarantine her and do 100% daily changes to see if she perks up at all.The best treatment for illness is clean water and good food.

yep, I will try to do that
thank you

 

[BlueBettaFlo]

From what I've read on here 3 girls in a 5 gallon is a bad idea. A sorority needs at least 4-5+ females. If you take your girl out separate the other two, they will fight. and a 5 gallon really isn't the best size. Here's the sticky on sororities http://www.bettafish.com/showthread.php?t=29402&highlight=sororities

yes, i have seen the thread.
I have purchase a 10 gallon tank two days ago, and planed to buy 1-2 new friends for them this weekend

Actually i rescued them from a fish street vendors, because they were sold way too young, and placed almost like 20 fishes in 2 gallon tank. i think it's okay to placed the girls in 5 gal since they are still very young. but it's not.. :-?

anw thanks a lot! :-D