my bottomless nano - The Planted Tank Forum
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post #1 of 39 (permalink) Old 08-12-2011, 05:27 PM Thread Starter
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my bottomless nano

I had some glass around the house and wanted to try this. Here's what I came up with. It works well, but I'm dealing with the water in the bottomless part getting a bit stagnate. I'm working on some ideas of how to solve this. I'm going to try and glue some airline in the corner to the top and connect it to a small powerhead. It works, but the powerhead is WAY too powerful. I'm still working on it. It holds about 2 gallons. I had neons and a betta in there for a while, but I've since moved them and drained it until I get all the details worked out.

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post #2 of 39 (permalink) Old 08-13-2011, 03:33 AM
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I don't see how you can keep the water in the center tank well oxygenated. It has no access to atmospheric oxygen, no way to get it from the surrounding water, and any attempt to supply it will drop the water back into the lower tank, possibly overflowing it. What is your objective with this?

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post #3 of 39 (permalink) Old 08-13-2011, 03:37 AM
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I don't understand what's going on here.

I imagine some O2 would get in through diffusion, but I still don't get the point.

"A" for originality though. I have definitely never seen this before. Just because i don't see the point doesn't mean you can't enjoy it.
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post #4 of 39 (permalink) Old 08-13-2011, 04:16 AM
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I've considered doing something similar a few times, but I have kids and they are destruction-y.

If I'm not mistaken the bottom portion of the front glass of the inner part doesn't extend to the bottom of the tank, is that right?

If that's the case, you're going to need a powerhead of some sort to mix the water. You could try using the pump from one of those desktop fountains that you can buy at Target/Walmart. The flow rate on those is small enough that it shouldn't cause any issues, and it ought to come with tubing that connects the pump to the fountain fixture. You could also try something like an Aquaclear 10 turned down to its lowest setting. I use that in a 3 gallon jar without any issues.
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post #5 of 39 (permalink) Old 08-13-2011, 04:18 AM
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I don't understand what's going on here.
The water fills the inner tank entirely. It's so that the fish could swim up out of the level of the tank, basically. Heck, what's the point of any of this? It looks cool.
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post #6 of 39 (permalink) Old 08-13-2011, 04:25 AM
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I can't help you but this one is very cool

http://showcase.aquatic-gardeners.or...=0&vol=0&id=86
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post #7 of 39 (permalink) Old 08-14-2011, 02:12 AM
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I can't help you but this one is very cool

http://showcase.aquatic-gardeners.or...=0&vol=0&id=86
very cool indeed. I'm still trying to wrap my head around the fact that the wood is, or appears to be, going through the glass.

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post #8 of 39 (permalink) Old 08-14-2011, 03:14 AM
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If you can keep oxygen in the raised water portion it should work ok. I would make sure the bottom tank has enough extra room to hold all of the total water in the two tanks. But, I don't see how you can get oxygen to the high tank.

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post #9 of 39 (permalink) Old 08-14-2011, 04:21 AM
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Wouldn't circulating the water with a powerhead/pump/circulator work to keep it oxygenated? It seems to me that as long as the water in the upper part continously mixes with the water in the lower part, they would stay similarly oxygenated, or am I missing something?
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post #10 of 39 (permalink) Old 08-14-2011, 04:39 AM
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very cool indeed. I'm still trying to wrap my head around the fact that the wood is, or appears to be, going through the glass.
Either photoshop or they glued the wood on the outside to correspond with where it ends on the inside :P

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post #11 of 39 (permalink) Old 08-14-2011, 04:53 AM
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Yup they cut the wood and glued it.
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post #12 of 39 (permalink) Old 08-14-2011, 05:56 AM
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Wouldn't circulating the water with a powerhead/pump/circulator work to keep it oxygenated? It seems to me that as long as the water in the upper part continously mixes with the water in the lower part, they would stay similarly oxygenated, or am I missing something?
I think the OP tried this but didn't have a small enough powerhead to do the job without creating a vortex of doom inside the raised part.
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post #13 of 39 (permalink) Old 08-14-2011, 01:25 PM
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Hmmm. Yeah V.O.D. = Bad Thing.
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post #14 of 39 (permalink) Old 08-14-2011, 04:05 PM
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Hmmm. Yeah V.O.D. = Bad Thing.
Now i'm curious.. What is this Doomlike Vortex you speak of?


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post #15 of 39 (permalink) Old 08-14-2011, 04:30 PM
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Check on youtube, there are a few people in Malaysia or Indonesia with these types of tanks. I would think that a TINY powerhead or a really small pond pump at the base of the center tank should be able to move sufficient water around. Water goes up and moves down the side of the inside tank, flows out and mixes with the outer tank water.
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