Water changes

After your cycle is over and then it can depend on your tank and equipment (Skimmer? Algae Scrubber? Sump?). I try to do at least 5 gallons every two weeks. Every now and then I will get mad at it and to a 10 gallon change.
 
I agree with biff.. i do mine everyother week at 20%... Was doing it every week then let it go a few times saw no change over 2 weeks so stuck with evryother week changes...
 
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