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Old 10-18-2005, 04:34 AM   #1
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Newbie needs some help with a filtration system.

I have converted an old bubble gum machine into an aquarium but now I find myself at a stand still concerning the water filtration system. The sphere when empty holds about 13 gallons of water, and the opening on the top is 5.5in in diameter. I guess I am looking for a filtration system that can go inside of the tank through the opening, or possibly one that can hang from the rim.

Form is a big issue for me concerning this tank. I would hate to have to remove the top that covers the opening and have a large filter sticking out. With that top on there is maybe an inch, though probably less, of space between the lid and the desired water level. If anyone can help me find the pump that is right for this project I would be greatly appreciative. If there is anything else needed to be known please ask. If need be, it may be possible to come in through the bottom, if an idea can be brought fourth where that is the scenario.

Thanks.
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Old 10-18-2005, 04:38 AM   #2
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For reference, the bubble gum machine is the same model as the one in this image.

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Old 10-18-2005, 05:15 AM   #3
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You have three options as I see it:

1. A round undergravel filter tun by an airpump (airline would need to be fed in through the bubble top).

2. A small submersible filter, such as a Fluval 1+.

3. A canister filter with the intake and outflow hoses entering the bubble via drilled (and sealed) holes in the bubble bottom.

I am not sure just how easily the third option would be engineered, as I am not familiar with the construction of the bubble's bottom, what sort of a cavity lies just beneath it, and how each (or either) have been modified to permit the bubble to be water-tight. The third option would also likely be the most esthetic, provide the best filtration, but also be the most difficult and expensive, too.
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Old 10-18-2005, 05:34 AM   #4
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The bottom of the bubble is plugged up with plastic and bondo, heh.
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Old 10-18-2005, 05:39 AM   #5
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Do you think that you could drill it to safely and securely introduce a couple of tubes into the tank without having to worry about long-term integrity?
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Old 10-18-2005, 06:19 AM   #6
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Id say it is possible. There is already a tube runing through for air bubbles. If i got one of those pumps would it include everything i need, or would i need to buy some pipe? Also, once the tubes go inside of the bubble how do they function? I mean, from the inside, would there just be an in and an out tube sticking up through the bottom, or would they need to connect to something?
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Old 10-18-2005, 06:24 AM   #7
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What about this Fluval 1+ filter? How does it work?
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Old 10-18-2005, 06:30 AM   #8
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Quote:
Originally Posted by ThrowingChicken
Id say it is possible. There is already a tube runing through for air bubbles. If i got one of those pumps would it include everything i need, or would i need to buy some pipe? Also, once the tubes go inside of the bubble how do they function? I mean, from the inside, would there just be an in and an out tube sticking up through the bottom, or would they need to connect to something?
You might need to buy some extra tubing to make it work better and look good. The tubes would come out and terminate in a canister filter like these:

http://www.aquariumpharm.com/filstar.html
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Old 10-18-2005, 06:32 AM   #9
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Quote:
Originally Posted by ThrowingChicken
What about this Fluval 1+ filter? How does it work?
Basically a pump on top of a filter box that is a submersible unit. See one here:

http://www.hagen.com/canada/english/...01001650011001
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Old 10-18-2005, 06:40 AM   #10
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So the Fluval would be kind of the economy way to go, but the canister filter is better. If I went with the Fluval what would be the cons besides it having to be seen and be in the way?
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