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Old 25-02-2012, 12:09 AM   #21
Framejumb0
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Originally Posted by John View Post
No not this one. It is full sized 2217 canister without motor . I bought one from petmart . Its called " eheim classic prefilter 600" . Exactly same body as 2217
Haha it is called dummy canister bro. Then it is good. The thinner diameter the better. Restrict you powerhead flow by reducing the hose diameter. Then get the right flow rate about 110 l/h. Best to test which maximum flow rate that can give the lowest NitrAte level. This way you will not replenish all the Oxygen content in water flow through Dummy canister. If you have sufficient meters, yo can see that outlet got low Oxygen ppm than inlet.
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Old 25-02-2012, 10:34 AM   #22
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And when u restrict the flow, remember to put ball valve or whatever valve in outlet. Not the inlet side. Powerhead impeller will have minimum effect by doing that.
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Old 25-02-2012, 10:52 AM   #23
leowboy
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Are you refering to this one. I saw it at eheim japan website.

http://www.eheim.jp/pdf/subfilter_set_2213,2215.pdf

http://www.eheim.jp/pdf/sub-filter_4type_manual.pdf
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Old 25-02-2012, 01:35 PM   #24
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Yes yes thats the one .

Oops its sub filter not prefilter
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