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I've had eheim and Fluval both good filters but I went with Fluval. I have a Fluval FX6 I have it on my 125 gal fresh water aquarium and it works flawlessly. Keeps my tank crystal blue clear. You get what you pay for
I run all Fluval. 205, 406, and a c (?) 30 HOB. Live them to death do us part. I cannot comment on any others, as I do not have any experience otherwise.