I bought six habrosus cories a few days ago, and when I got back from my morning class they all looked fine -- but a moment ago one of them went belly-up. I noticed he was still moving so I dropped a drop of water on him with a turkey baster and he flipped back over and swam down, but after a few moments flipped over and went belly-up again. Every now and then he flips over and tries to swim down, but it's like something is making him drift back up and he can't get to the bottom.
Please help, I'm panicking -- is there anything I can do for this little guy??
What size is your tank? 15h
What temperature is your tank? 78 fahrenheit
Does your tank have a filter? Yes, Hydro-Sponge II
Does your tank have an air stone or other type of aeration? Airstone used in conjuction w/ the filter (inside the sponge, attached to the tubing).
Is your tank heated? Yes
What tank mates does your fish live with? Right now it's just six corydora habrosus, an anubias plant, and some snails that came in with the plant which I've been trying to weed out.
What type of food do you feed your fish? Hikari sinking wafers
How often do you feed your fish? One wafer daily
How often do you perform a water change? Weekly
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? Tetra AquaSafe, AQ salt if needed
Have you tested your water? If so, what are the following parameters?
Symptoms and Treatment
How has your fish's appearance changed? He seems to be bloated. There might be a little damage to the dorsal fin, but it's very hard to tell since the fish is tiny (less than an inch) and the fins are mostly translucent.
How has your betta fish's behavior changed? He keeps trying to swim down but then he drifts up, sometimes staying at the top of the water, belly-up, for a while. He also sometimes lies upside-down at the bottom.
When did you start noticing the symptoms?
Have you started treating your fish? If so, how? I've moved him to a small plastic bowl to isolate him and be able to observe him better, but that's all.
Does your fish have any history of being ill? No. I only brought these guys home a few days ago, but they've all seemed healthy and active.
How old is your fish (approximately)? I'm not sure. I only know that he's under an inch in length, so probably still young.
I've had a few of these guys do that to me too, and nothing has ever helped within a couple days they'd died. I hope yours makes it I still have a school of 6 habrosus they're funny when they divebomb up for air!
Thanks so much for the advice, guys. He seemed to be doing somewhat better for a while, but unfortunately I lost the little guy. :( I live by the ocean, so I gave him a little funeral service at the beach.
The others seem to be doing okay, and no signs of bloating from them. I don't know what happened but at least no one else seems to be affected.