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Old 12/08/2017, 10:43 AM   #8
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Join Date: Aug 2001
Location: California
Posts: 2,244
You probably don't need one. Having said that I run one on my 40 breeder that does not have a sump. If I had a sump I probably wouldn't run the skimmer to be honest. When I turn off the skimmer for a couple days a film will build up regardless of how much surface agitation I add. Skimmer on and it is gone. So it works. I run a CPR Bak Pak that I've had for years now and continues to work.

Post 326 in this thread will show you a 3d printed skimmer:


Current Tank Info: 210 gallon mixed reef
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