I've also added the Apex DOS which does my water changes at a rate of 10g per week and this way I get to make saltwater once for 24 days every two weeks and I don't have to worry about water changes.
DOS is a bit loud, however its in my shed so it doesn't matter
I still do a 10g manual water change once every 3 months to clean up the sump and vacuum part of the sand.
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Casual reefer
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