Yes, but how much does doing the water change help? I know that it can really help dilute nitrates but a correctly setup tank and filter system should already be breaking down the nitrates. So assuming that your filter system is working correctly, does one really need to do water changes? Maybe we only need to do one 20% once a year, or a lot less frequently then we currently think.
It sounds like at least one or two people does not do water changes and their tanks are just fine. So, they are either doing something no one else is or the water changes aren't as helpful as everyone thinks. This makes me wonder if technology and our understanding of keeping SW
tanks has made it so that it's not necessary to do water changes in properly setup tanks.
Anyone else not do water changes or have any comments on this?