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How Often to Change the Water in a Saltwater Aquarium

 How Often to Change the Water in a Saltwater Aquarium

Changing water is one of the most effective routine tasks for keeping a saltwater aquarium stable. But “how often” depends less on a calendar and more on your tank’s bioload, filtration, and water-test trends—especially nitrate, ammonia, nitrite, and salinity.

In general, most saltwater aquariums do best with partial water changes rather than frequent full swaps. Partial changes dilute accumulated dissolved o ... Read more »

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