Okay, so I have two female betta in a 5.5g tank. I've had them both since December and they were both quarantined for a month before I put them together. Saria (black with red/blue fins) has had swim bladder issues since I bought her. I recently went away for a weekend (Friday night to Sunday evening) and when I came back, both Babydoll and Saria looked terrible. It seems like Babydoll has developed a swim bladder issue and Saria's has gotten worse. I've tried 100% water changes and epsom salts, but so far nothing has helped. :c I'm getting worried.
Since it's hard to get pictures of them swimming, I've also recorded a video: here
What size is your tank? 5.5g
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? Yes
What tank mates does your betta fish live with? Just the two females
What type of food do you feed your betta fish? Hikari Betta Bio-Gold
How often do you feed your betta fish? 2 pellets, three times a day. Fast on Sunday.
How often do you perform a water change? Once a week / once a month
What percentage of the water do you change when you perform a water change? 25% / 100%
What type of additives do you add to the water when you perform a water change? Prime
Have you tested your water? If so, what are the following parameters?
pH: 6.5 - 7
Symptoms and Treatment
How has your betta fish's appearance changed? N/A
How has your betta fish's behavior changed? Lethargic, can't swim properly. Babydoll is less interested in food.
When did you start noticing the symptoms? About a week and a half ago
Have you started treating your fish? If so, how? 1tbsp epsom salt per gallon of water. I attempted fasting them both for 2 days. I also tried feeding them frozen bloodworms instead of pellets. 100% water changes.
Does your fish have any history of being ill? Saria does - she has perpetual swim bladder issues that don't normally interfere with her behaviour. Babydoll does not.
How old is your fish (approximately)? No idea. Bought them both in December.
*I do realize my tank is not very well planted. Most of my plants died when I went on vacation a couple months ago, but I am working on it with a student budget. c:*