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why do pygmy cories become so active after waterchange ??

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After I do a water change, they suddenly swim all over the place, shoal, dart up to the surface, scavenge the substrate... basically, they are SUPER active. I have a really small shoal (4 currently, getting more tomorrow though) in a 30gal, and they pretty much just chill and hide in my plants for most the day. However when I do a water change, they start rushing around!

Is it the increase in water current? Is it because it kicks up the substrate? Is it just the fresh water? Is is the temperature change? Is there anyway to know what specifically they enjoy about it so much??

The only reason I wonder this is because of the water current ... would they enjoy one of those current devices?  I just want them to be happy 😂😭😭

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On 4/25/2024 at 8:50 PM, Biotope Biologist said:

When the water changes in the amazon it’s usually a sign of the rainy season approaching which means breeding time for your little tikes. 

I imagine thats what has them motivated haha



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