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Discussion Starter · #1 ·
I have a JBJ Reaction 4stage Canister Filter EFU-35.

Has anyone ever replaced the impeller with a larger one to increase the flow through the filter?
Your answer does not have to be specific to this filter, but any hardware upgrade to flow suggestions would be helpful. I have heard that Eheims can have their pumps replaced with larger pumps.

Also, please assume the plumbing is efficient as possible.
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