MarinaClown
Aquarium Advice FINatic
Everyone made good points. And they also have there own reasons for having one.
Like you said. If you can do your weekly water changes its not needed. If you can't perform your weekly changes then a skimmer will help.
Did you try skipping weekly water changes when you were running your skimmers? If so what was the result? I wonder if having a skimmer can enable one to do water changes biweekly instead of every week and keep parameters on the same levels if not lower. Thanks.