One of my corys- a panda cory who was introduced to the tank a couple of months ago and has settled in very well with the two older ones- was fine this morning; some time within the space of an hour or two, her behaviour became frantic. She was swimming around the tank frantically, bashing into rocks and driftwood, flipping over etc. I didn't see much of this (my fiance alerted me to the issue) but when I found her she was tucked away in a tiny nook between some rocks, upside down.
I managed to gently coax her out, at which point she rested right-side-up on the sand for a while, before she disappeared again and was in another nook, again belly up. I moved a rock and she came out, and I was able to catch her with no trouble (and with minimal stress to her) and pop her in a large "breeding box" I pop fry in after my guppies give birth.
This seemed to help as for a few hours she stayed right side up, occasionally moving around the box a little and looking like she'd pull through, but now she's been on her side unmoving for a while and I'm pretty sure she's not going to make it.
My main concern now is trying to get some sort of understanding as to what did- or may- have happened so I can avoid it in future (or know what the best course of action is.) There are no other signs of illness or injury, and I literally finished doing a course of internal bacteria and disease treatment due to another fish who has always been a bit sickly and has been very peaky (he is now also quarantined, as he was recovering fine until his fellow guppies decided to try to eat him- no mysteries in his case and I don't think there's anything overly infectious unless the immune system is compromised.) So it seems unlikely to me to be internal bacteria, but I'll freely admit- I am not an expert fish keeper.
My tank is 60 litres and has been established for a few years, has three adult corys and five adult guppies, including the two who are now in individual boxes; the cory in question, and three of the guppies, are not full size. Water changes (and filter cleaning) happens twice a week; the last one was two days ago, with each change being approximately 25%. There are plenty of live plants.
The fish get fed frozen food blocks once a week, with occasionally getting a scraping from the food blocks I use to feed the fry tank; the corys get pellets between main feedings, but normally get plenty from the frozen block come down anyway. I added a small amount of sand, washed well in tank water, and some java moss and java ferns about a week ago. Once the anti-internal bacteria course was finished a couple of days ago I added a little fin rot as the sickly guppy had had his tail badly nipped; none of the fish reacted to the treatment at the time. No other fish are sick.
I hope that information is sufficient to help to work out what happened; and uh... I apologise in advance for any stupid mistakes I've made, or really obvious information that I've left out.
I managed to gently coax her out, at which point she rested right-side-up on the sand for a while, before she disappeared again and was in another nook, again belly up. I moved a rock and she came out, and I was able to catch her with no trouble (and with minimal stress to her) and pop her in a large "breeding box" I pop fry in after my guppies give birth.
This seemed to help as for a few hours she stayed right side up, occasionally moving around the box a little and looking like she'd pull through, but now she's been on her side unmoving for a while and I'm pretty sure she's not going to make it.
My main concern now is trying to get some sort of understanding as to what did- or may- have happened so I can avoid it in future (or know what the best course of action is.) There are no other signs of illness or injury, and I literally finished doing a course of internal bacteria and disease treatment due to another fish who has always been a bit sickly and has been very peaky (he is now also quarantined, as he was recovering fine until his fellow guppies decided to try to eat him- no mysteries in his case and I don't think there's anything overly infectious unless the immune system is compromised.) So it seems unlikely to me to be internal bacteria, but I'll freely admit- I am not an expert fish keeper.
My tank is 60 litres and has been established for a few years, has three adult corys and five adult guppies, including the two who are now in individual boxes; the cory in question, and three of the guppies, are not full size. Water changes (and filter cleaning) happens twice a week; the last one was two days ago, with each change being approximately 25%. There are plenty of live plants.
The fish get fed frozen food blocks once a week, with occasionally getting a scraping from the food blocks I use to feed the fry tank; the corys get pellets between main feedings, but normally get plenty from the frozen block come down anyway. I added a small amount of sand, washed well in tank water, and some java moss and java ferns about a week ago. Once the anti-internal bacteria course was finished a couple of days ago I added a little fin rot as the sickly guppy had had his tail badly nipped; none of the fish reacted to the treatment at the time. No other fish are sick.
I hope that information is sufficient to help to work out what happened; and uh... I apologise in advance for any stupid mistakes I've made, or really obvious information that I've left out.
