Combining Eheim filters.

[FluffySackson]

Hey Eheim fanatics, I have an eheim 2217 combined an eheim 2213 subfilter (a canister without a motor, intended to combine with another classic canister) and would like to buy an Eheim 2078 Pro 3, connect the outtake tube into the Eheim 2217's intake disconnect. Will this damage the flow rate significantly?

 

[mudbuttjones]

I've found that the less you mess with canister filters the better they work. including ommiting inline equipment and fancy spraybars. I was working on a manifold that would run 2 canisters off of one siphon or intake tube that branched off. I temporarily abandoned the project.

I have no doubt what your describing will work, however most canisters don't have very powerful motors especially eheim, their stuff is extremely energy efficient, not that its a bad thing. . The force of the falling (siphon) water helps assist the pump. Its a fairly delicate and balanced symbiotic relationship between the siphon and return. I think you may lose some of that benefit by adding 2 inline together. But you can always try it. It may work just fine.

:edit: what I mean to say is the siphoning water is basically free energy (not that there is such a thing really). It naturally rises because of all of the incoming pressure. This puts no negative pressure on the impeller, its only pushing water, it doesn't have to pull water. Evidence of this would be If you were to unplug the canuster and pull the return hose off water would spray everywhere even with out the pump's effort.

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[FluffySackson]

I've found that the less you mess with canister filters the better they work. including ommiting inline equipment and fancy spraybars. I was working on a manifold that would run 2 canisters off of one siphon or intake tube that branched off. I temporarily abandoned the project.

I have no doubt what your describing will work, however most canisters don't have very powerful motors especially eheim, their stuff is extremely energy efficient, not that its a bad thing. . The force of the falling (siphon) water helps assist the pump. Its a fairly delicate and balanced symbiotic relationship between the siphon and return. I think you may lose some of that benefit by adding 2 inline together. But you can always try it. It may work just fine.

:edit: what I mean to say is the siphoning water is basically free energy (not that there is such a thing really). It naturally rises because of all of the incoming pressure. This puts no negative pressure on the impeller, its only pushing water, it doesn't have to pull water. Evidence of this would be If you were to unplug the canuster and pull the return hose off water would spray everywhere even with out the pump's effort.

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Water spraying everywhere wouldn't be a problem with the Eheim classic canister's quick disconnect valves. Thanks, I don't mind a slightly dampened flow rate, I plan to fill up up the other 2 filters with eheim bio media to the brim, that stuff is the bee's knees of bio media to me.

 

[HarleyK]

Howdy

If I understand you correctly, you are currently running two canisters with one classic pump, and you are thinking about hooking up three to a Pro filter.
My main concern would be pump longevity. You are massively increasing resistance of flow, which will wear out your pumps prematurely. I've had Eheims last twenty years before the pump went bad. I'd say I got my money's worth out of those filters. Not sure if you wouldn't be better off getting a larger canister, e.g. 2260.

Just my two cents

HarleyK





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