Tropical Fish Forum

Tropical Fish Keeping Help and Advice => The Emergency Room => Topic started by: Vanadia on October 30, 2020, 09:15:58 AM

Title: Lethargic Bronze Cory lying on side
Post by: Vanadia on October 30, 2020, 09:15:58 AM

One of my bronze corys (which I purchased a month ago) is being very lethargic and lying on it's side. It has been like this since yesterday. I have tried feeding it a pea, but it seems to have low energy rather than buoyancy issues.

Water parameters are fine in the tank, 0 ammonia, 0 nitrite, 10 nitrates and a pH of around 7.5. I haven't added any new stock since I added the cory. The only other issue I have had in the aquarium is the gourami eye issue (https://forums.thinkfish.co.uk/fish-health/gourami-with-cloudy-eye/msg50311/#new), which I strongly suspect is an injury as it hasn't affected any other fish and only the 1 eye on the gourami.

Any ideas what could be wrong?

Thanks

Title: Re: Lethargic Bronze Cory lying on side
Post by: Fishbeard on October 30, 2020, 12:12:58 PM

Hi Vanadia,

I take it that the other bronze corys seem normal?

I've read about corys being sensitive to oxygen levels in tanks, and not getting on well with people dosing CO2 - is this something you're doing?

The usual go-to for a lot of cases is a water change - when did you last do one?

Title: Re: Lethargic Bronze Cory lying on side
Post by: Vanadia on October 30, 2020, 12:23:51 PM

I have 3 more bronze corys and all are behaving normally. I last did a water change on Sunday, I do water changes weekly of around 25 - 30%.

I don't use CO2 at all in my aquarium.

The cory is in quite a bad way so I have moved it to a small tank with a low water level for now so it can still get to the surface to gulp air.

Title: Re: Lethargic Bronze Cory lying on side
Post by: fcmf on October 30, 2020, 01:04:55 PM

Sorry to read about this, Vanadia. I'm not sure that I can help as it seems all bases are covered (feeding pea, water quality, ensuring sufficient oxygen in tank and water changes as per Fishbeard's helpful comments, and ultimately moving to an isolation tank with low water level for the very reason you've done so). Following on from Fishbeard's advice, ensuring that the isolation tank's filter outflow is giving sufficient surface agitation or an airstone is present, and small water changes on the isolation tank, might help... but I wouldn't hold out a lot of hope. Best of luck.

Title: Re: Lethargic Bronze Cory lying on side
Post by: Vanadia on October 31, 2020, 08:21:16 AM

Thanks for the helpful comments.

Unfortunately the cory died this morning  :(

I have absolutely no idea what was wrong.

Title: Re: Lethargic Bronze Cory lying on side
Post by: Fishbeard on October 31, 2020, 11:02:51 AM

I'm sorry for your loss Vanadia.

It's very frustrating when fish die for what appears to be no reason. Sometimes fish are just sickly, but you tried your best and that's all you can do.