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Not necessarily - if you completely remove all the water, you could lose most of your beneficial bacteria that helped to establish your tank when it cycled. If your fish died from something parasitic, then yes, you need to clean absolutely everything. If it died due to a water quality issue, then no.

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12y ago

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How often should I change the water in my fish tank?

You should change the water in your fish tank every 1-2 weeks to maintain a healthy environment for your fish.


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