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How frequently do you make water change?


mrblur
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that is a big change being 300L per week

10% weekly or a 15% fortnightly is actually enough provided that your water parameters are good, the change will replenish elements such as calcium and carbonates used up by coral. however you will need to test to keep up with changes, test kits such are calcium, alkalinity, magnesium is needed if you are keeping hard corals.

you can add in trace elements and iodide to help the corals in general, but not absolutely required. Some would recommend adding a cap full of eco-bact water conditioner, not necessary if you have sufficient live rocks and substrate.

important to keep tank ph and alkalinity stable, avoid major fluctuations.

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