Fluval C2 C3 C4 flowrate difference

stereo

Jack Dempsey
MFK Member
Mar 26, 2006
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Singapore
Anybody know why fluval c2 c3 c4 using same motor specs yet can achieve difference flowrate?

C2 C3 C4 all 50hz n 5w
Under specs tab

Fluval filter casing can determine the flowrate too? Using same motor?
 

deeda

Silver Tier VIP
MFK Member
Mar 26, 2008
3,137
1,214
1,279
Medina, Ohio
After a quick search, the intake tubes on the C2/C3 are the same size but the impeller part # is different. The C4 uses a different intake tube and an impeller with more vanes. The filter housings are also different between the 3 models.

Just a quick guess is that the different combinations of impeller size, number of vanes, maybe intake diameter and housing capacity affect the GPH of the filter. It's early for me so I may have got some info wrong. 😉
 
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