Woke up this AM and my fave girl was hiding and acting odd, breathing heavy. I had added some driftwood yesterday (after running it 2 cycles through the dishwasher on sanitize setting). Everyone else (6 other bettas plus 6 mollies) are all normal. Water was heavily tannined, so I did a 60-70% WC, thinking maybe something toxic was leaching, also removed the wood. She has since started to just bob, and her gills don't seem to be holding air. When she comes up for air, swimming up in an aimless motion, tons of bubbles shoot out, and before it didn't. She looks dead, she's doing that comatose type float, faintly moving her mouth and gills, and her eyes look blank and don't follow. Occasionally she'll move quickly to the surface for air but then drift back down. I moved her to a small container, floating it in the tank, with about 2 inches of water, conditioned with stress coat. She does look a smidge bloated, so I added some epsom. She is just tanking by the second. She is my favorite, I don't want to lose her!
What size is your tank?-normally a 20G
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?-yes
Is your tank heated?-yes
What tank mates does your betta fish live with?-6 other bettas plus 3 grown mollies and 3 molly fry
What type of food do you feed your betta fish?- They get Omega One betta flakes, 2 small pinches daily. Once a week, they get a mixture of frozen daphnia and blood worms (small portion, maybe 1 Tbsp of them, thawed, after only using about 1/16 of the cube each).
How often do you feed your betta fish?-see above
How often do you perform a water change?-weekly 25%, or as needed, if parameters are off, and they haven't been
What percentage of the water do you change when you perform a water change?see above
What type of additives do you add to the water when you perform a water change?-Stress Coat or Prime, I alternate, dosing per bottle instructions
Have you tested your water? If so, what are the following parameters?
-It's testing now, but 3 days ago it was perfect, with only 5 nitrates, all else 0.
Symptoms and Treatment
How has your betta fish's appearance changed?-Suddenly lethargic, seemingly comatose. Belly only slightly bloated. Not clamped.
How has your betta fish's behavior changed?-comatose is the best description, where normally she is active and curious
When did you start noticing the symptoms?-first thing this morning
Have you started treating your fish? If so, how?-have her in a shallow QT container floating, filled with Stress Coat conditioned water, and Epsom salt
Does your fish have any history of being ill?- no, she was malnourished when I bought her, and just weak, but not infections or illnesses. She is ugly I guess, and by that I mean it looks like her genetics are poor. She has a super long body, her back end has always sort of sagged, her fins are ugly (she's a messy crowntail), etc. Maybe something genetic?
How old is your fish (approximately)?-She is smallish, but adult. I've had her since early March. I suspect she is about 5 months old?