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Discussion Starter · #1 ·
Yesterday I put in a 50w adjustable heater in one of my 10 gal tanks. There are 4 cories in there, and I've noticed that one of them is definitely not right. I had to do a lot of adjusting with the heater to get it in the right place, but from what my two thermometers say, the temp has not gone below 76 or above 82. I did a 50% water change today, and tested the water before. Everything was normal. The other fish are fine, but the one cory is on a plant that is stationary at the top of the tank. He sits with the front part of his body up. What did I do?
 

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It might just be you moving the heater around that has caused it stress.

Perhaps wait a day and see if it is still behaving like that.
 

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Discussion Starter · #4 ·
Thanks! It seemed a lot better today. It was actually searching for food, but it still sits in one spot some times. I've never had a fish stress out like that before!
 

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Each fish is different and some take a few weeks sometimes to be happy,

It is a good sign though he is looking for food.
 
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