What % of water do I change?

[Komodo]

From what I can see on this forum, fish keepers change anywhere from twenty-five to sixty present of the tank water per week.

In my 104 gallon tank, I will have twenty Malawi Cichlids, three inch average in size, two catfish.

What percentage of water would you change and how often?


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[Mebbid]

Water changes should be done based on need. If your nitrates are high, then do a larger water change.

That being said, 50% weekly should be able to handle the bio load of any reasonably stocked tank easily.

 

[Brookster123]

Test your nitrates, whatever it takes to keep it below 20ppm.

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