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dying fish

Need some help or advice quickly.

dying fish

Postby kazza » Thu Jun 12, 2014 3:36 pm

Hi I've had my 25L cold water tank stable for around 3 years. Went away for a week, and my son didn't refresh water as he was asked, and came back to 2 dead fish. The tank is filtered and has a light, plus an bubble air strip in the bottom. I removed the dead fish, replenished 20% of the water and left it for about a week. I've added 2 small gold fish and after a day in the tank they don't look happy at all. Fins flat, sleepy looking, but they are feeding! Help, any suggestions?
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Re: dying fish

Postby POS_miniracer » Thu Jun 12, 2014 7:55 pm

Have you tested the water to see if the parameters are off?
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Re: dying fish

Postby Graeme » Fri Jun 13, 2014 7:37 am

Could he have changed too much water or spilt some food in the tank and caused an ammonia spike? Was the water cloudy when you got home? I would do another 25%-30% now and test for ammonia.
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Re: dying fish

Postby malakye » Sun Jun 15, 2014 12:06 am

25litres is too small for goldfish but the issue will be you had dead fish which will have caused an ammonia spike, you need to change another 25% water asap or you could loose the little guys, then do another in a day or two. With it being such a small tank one missed water change throws everything in the air and when things go bad in a small tank they go bad quickly. Do you know how long the fish had been dead for?
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