10% water change weekly or 20% water change every 2 weeks?

[Maddevil1]

I do 2-3 gallons per week on my BC14

[steviejitsu]

haha... i didn't know less was sometimes better sometimes! I used to be a freshwater and i assumed saltwater was the same. for past 3 months i've been doing AT LEAST 50% water change. more like 75% every 1.5 weeks haha. corals seem to be living...

[Apoptosis]

20% weekly for me