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Old 05-25-2009, 10:33 PM   #1
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Lightbulb DIY canister filter for nano

I'd like to get your input on an idea I've had. I'd like to add some extra bio filtration in my 12g nano but don't have any idea how I could manage to build a sump with a tank like that that's already setup and almost a year old.

I tried to buy a canister filter off ebay but that didn't work out too well. I was going to fill it with live rock and I thought that would also give the water a little more movment as well as provide a little extra filtration.

So here's my horrible little drawing
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Old 05-25-2009, 10:36 PM   #2
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The water would be pulled out of the tank via a small pump, I'm not sure which pump would do the job. The hose would be about three feet long so the pump wont have to be very powerful, but must be powerful enough to pull out the tank, push thru the rubble and back out the other side in to the tank again.

So first thing I guess is do you think the general idea is sound?
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Old 05-25-2009, 10:39 PM   #3
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Next question would be what kind of canister, it has to be able to close tight enough so that the pressure cause leaking. I was looking at things like this:

Plastic Pails And Lids

But I'm just not sure. The tank sits on a small TV stand which is about 2 feet off the ground and has a small area inside where I could store a tank if it were say a rectangular box.

I had thought about doing a sump but just don't see how I could easily drain the water from an established tank without drilling and such.

Also I am thinking I could build something like this for cheap, easily lass than $100.
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Old 05-25-2009, 10:40 PM   #4
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I think thats a nice design!

The only suggestion I have is to get an inline pump and connect it to the canister so it pulls water out of the tank, through the filter, into the pump, and back into the tank.

I think it works better but that's just me.
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Old 05-25-2009, 10:49 PM   #5
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The power of the pump is also an issue, too strong and the PSI could be too great for the container, too low and it's not enough to force it in and back out again. In this design the water flow enters at the bottom and exits via the path of least resistance at the top.
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Old 05-25-2009, 10:51 PM   #6
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I was thinking about something like this. http://www.bigalsonline.com/BigAlsUS...utilitypump900

It's an inline design so I don't have to place yet another power cord in to my tank.
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Old 05-25-2009, 10:53 PM   #7
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I guess the plus side of using a larger container also is volume. If my container is 5 gallon, and my tank 12, now I have 17 gallons of water, minus the obvious live rock, sand, and critters in the tank and filter...
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Old 05-25-2009, 10:54 PM   #8
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Look in the classifieds, there is a guy selling a Rena xp2 for $50. I pmd him and shipping was only $10. You couldnt build a canister for less than that.
The Rena xp2 will be more than enough for your tank.
Just trying to help.
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Old 05-25-2009, 10:57 PM   #9
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I built my canister filter for a 10G tank and it works great.

Here are some pics:



Like I said, the basic idea I had was to pull the water through the canister instead of push it. that way leaks are easier to fix. Second, the inline pump (A pentair Quiet One 1200) doesn't add alot of heat to the water. The canister I used was from walmart. it's a "lock'n'lock" brand somewhere with the plastic containers.


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Old 05-25-2009, 10:58 PM   #10
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Something like this would almost be perfect except I wouldn't be able to add the eggcrate.
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