WARNING: really dumb question

Oct 15, 2006
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#2
I don't have canisters, never seen one in real life (well maybe I have, at the petstore),...

I guess it would depend, because of the pull of the motor.
The flow rate is never going to be EXACT... for example, one rated for 300 GPH might run at 299, 298, 301, or 302, maybe even more both ways.
 

Guysy1110

Large Fish
Oct 26, 2006
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essex
#3
Ive thought about this before:

I.e: One filter intake splits and goes into each of the two filters IN takes, then from each canister a OUT take hose goes to the tank and joins the two togethter to make one output into the tank.

Sounds harder, becasue i cant explain propperly.

Give me 5 mins and ill do a diagram.
 

FroggyFox

Forum Manager
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May 16, 2003
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#5
I'm not sure what the point of it would be. If you're going to put two canisters on a tank, then I'd just put two canisters on the tank :) I think because of the fact that canisters work off of gravity, you wouldn't be able to connect them so that all of the water goes through both canisters before returning to the tank, because I don't think there's enough power to do that. Doing something like illustrated above would be better...but again, not sure why you'd want to go through the trouble :)
 

GIS Guy

Superstar Fish
Feb 18, 2004
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#6
Heather,
My thoughts precisely.
We are on the same wavelength!!

I read a thread this week that had be ponder this.
I can't remember which one it was tho.

This is diagram is what I was asking about.
One canister elevated above the other.
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.
.

 

#7
I see exactly what you're saying; Guysy was thinking about hooking two filters in parallel, while you were thinking of hooking them in series.

In either case, I don't really see a point... hooking them in parallel would add no benefit over two seperate filters; and I would think series filters would add no benefit, while having reduced bio capacity, as the second filter would get a reduced oxygen supply after the first one used much of it up.
 

Orion

Ultimate Fish
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Feb 10, 2003
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#8
What are you tring to accomplish?

If you think by linking them in series is going to give you added filtration, it wont, as bigred said. Also it's going to end up putting strain on one, or both of the motors, as the first one is going to get cloged sooner than the second, and then reducing the flow far sooner than the second.

IMHO, IF you wanted to hook two canisters in series like this, the best way probably would be to use a single in line pump in between the two and don't use the canister motors at all. But I fail to see why other than just a project to see what will happen.
 

Guysy1110

Large Fish
Oct 26, 2006
520
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#9
my thoughts where extra filtration and more water movement, but now i think about it it seems wrong. as said above i also think it might put strain on the motors, if i was to have two i would have them hooked up seperatly.

Anwways im sticking to my eheim until i upgrade to a better filter or a later model.
 

Mahamotorworks

Superstar Fish
Aug 26, 2006
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#11
There really isnt a benefit to running them inline you will still have the same amount of filter media, and water volume in the filters. I would just run both intakes and outputs to the tank. You will have more flow with the individual intake and outputs. By connecting the canisters in parallel you are going to cause a lot of strain on the one of the filters. You will also have less flow. It looks good on paper but in the long run you will ruin one of the filters.

MAHA