Keep in mind some people don't think so and some people don't use a skimmer at all and some believe they do more harm then good.I don't think they are that expensive. Especially considering they are one of the most important pieces of equipment.
Or you're like me and buy one every 1-2 years or less because you have fun trying and testing them out. Though my current one has so much flexibility it may last me a while (besides being the best performer by far...) I've already done quite a bit of testing and changes with it and plans for many more. [emoji1]How often do you buy a skimmer?
It's a lot like mattresses. You only buy one ever bazillion years... so they cost more because of that. If you bought a new one every month they'd be cheaper.
Well, just so you know there's differences of opinion and expierence, I decided 20 years ago they were useless. And I found it an amusing confirmation later that of the two oldest coral farmers in the US (Steve Tyree and Tropicorium) had come to the same conclusion at the same time and as well Julian Sprung stopped using skimmers in the late '90s. But if you still believe one is necessary here's Feldman, et al, review of skimmers, note their conclusion is "bubbles are bubbles":
Agree. And it is amazing how much better a good balanced skimmer is, doesn't have to be expensive, compared to one that is not. Even expensive ones could be junk if not done right.I have run without. Certain things (that are natural filters) grow well.
I have run with a small one. Again, same result.
I have run with a not-so-good larger one. Did ok.
Then I had a large powerout that left me with a monster nitrate problem. Spent a year and many bucks trying to fix that. Changed skimmers to a pretty-good one, and the nitrate problem literally dropped tens of points overnight and kept dropping, until it's optimum.
Depends on a lot of factors. Depends on what you've got. Depends on what you need.
Not equipping your tank with a sump so you can use a good one if you need it is not the best move for the future.
But novices can get by quite often without one---until they need one badly.
Did they write any articles on the subject. I'd like to read them. Also, what do they use in their systems if they don't use a skimmer?