Over flow/ tank connection - Nano Aquariums - Aquatic Plant Central

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Nano Aquariums Nanos aquariums may be small but they can make a striking canvas for your aquascapes.

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Old 04-03-2006, 03:26 PM   #1 (permalink)
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Default Over flow/ tank connection

I am interested in figuring out how I could have a red sea aqua vase hook up with my 29g and use the same water for ease of dosing and to eliminate a heater and a filter.

I was thinking a DIY overflow in one of the corners with a hole drilled in the bottom. On the other side have a tube going in near the bottom so I can hide it. I was thinking airline tubing and an aqua lifter but dont really think ~3 gph is enough to make it worth it. I could use some kind of dosing pump but they are kind of out of my budget unless I can find one cheap.

I am considering going pressurized co2 on my 29g instead of 3-2liter bottles. So I could also avoid any co2 equipment in the little tank.

Any suggestions on how to improve this idea I dont have the aqua vase yet but I am shopping around for the cheapest price or for something similar that comes with a light.
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Old 04-03-2006, 06:30 PM   #2 (permalink)
 
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Instead of drilling the bottom and having to section off part of the tank, how about a Durso standpipe into the side of the tank? Takes up less room and is easier to hide. Also limits surface turbulation and noise, though it doesn't sound like that will be a problem with your flow rate.

FWIW, I think with such a small tank, 3gph would still be beneficial, since you keep the bonus of maintained water level in the nano and ease of dosing. Could use a low gph powerhead and keep it at the bottom of the 29 to lower flowrate by increasing head height. Penguin 660 (170gph) gave me ~35gph at ~2ft head height and ~20gph at ~3ft head height, for example. On the return line, you'll need a siphon break or check valve to prevent reverse siphon during power outtage.

Hope this helps.

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Old 04-03-2006, 07:37 PM   #3 (permalink)
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The over flow is to prevent it from emptying and eliminating the check valve. I do like the Idea of having a shorter drop so I will look into something similar.

How could I use this without drilling a hole and setting a partition?

I was thinking a powerhead far away except I would have to use bigger tubing but I guess thats not that big of a deal.

I am still looking for a dosing pump since they also work as check valves and I could(I think) put this below the tank level and not have to worry about the big tank emptying into the little one. I am talking about the rotating thing pushing the liquid through a tube. Might not be strong enough but I could put in another really tiny pump just for circulation.

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Old 04-03-2006, 10:30 PM   #4 (permalink)
 
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Durso standpipe still needs a hole drilled, but if you drill the side pane you don't need the partition. Instead, you can house the downpipe outside the tank, and the only thing you'll need to hide is the pipe entry. Here's a shot of mine -- forgive the patch and mess, long story I was thinking you could do it with very small diameter pipe since your flow rate won't be high. If we both make the SCAPE meet the week after Easter, you can have my glass cutting bit if you want, btw.

As you probably know, there's also HOB overflows, which don't require drilling... maybe it could be done on a very small scale with some acrylic work or a cool container?

Only for clarification, the reverse siphon thing is on the return pipe to the nano. Water will back siphon until reaching a siphon break (a hole drilled into the return line, just below the water surface of the nano) or the pipe entry. It sounds like your pump will stop it for you, but if you drill the bottom of the tank for the return, I suggest a siphon break anyway for redundancy, just because I've back siphoned with a couple different pumps

HTH
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Old 04-04-2006, 02:45 PM   #5 (permalink)
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For the siphon break to the tank how could I construct this with airline tubing. I guess I dont really get how you put a hole in it and not have water come out. Maybe you cap it while the pump is on. Sorry about the ignorance but this is the first plumbing project I have taken on.

I like your stand pipe Idea since If I made a partition it would look like crap.

Now I have to fine those pieces for airline tubing. I wonder where I can find a U bend. I might just buy a cheap check valve to put in line with the pump instead of the siphon break since I dont really understand how it works.

I will try to make the meeting. Need to make sure I am not going snowboarding that weekend.
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Old 04-05-2006, 05:32 PM   #6 (permalink)
 
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For the siphon break, you just make a hole into the airline tubing. When the pump shuts off, water will flow back the return until air enters the line -- this can either be at the pipe exit or at a hole higher up in the pipe. Water will come out of the hole during normal operation, so its best to have the hole below the water line of the nano. You can see mine at the right of this pic -- when I turn off my pump, the water line in the main only falls about a 1/4" from that hole.

Another option is just to keep the return line's exit high in the tank, but lowering the pipe exit will reduce head height (how much the pump has to fight gravity) and increase flow rates. Either method works great.


I know you can slowly bend PVC by filling it with sand and heating it over a stove. Maybe something similar could be done with rigid airline tubing? If you have a friend who blows glass or a "head shop" nearby, maybe they could help out with a U-tube to your specs?

If you miss the meet but want the bit, PM me. (I am also unsure if I can attend.) Its like ~$7 at HD - Dremel 7134 Diamond bit. Many glass drilling howtos recommend another bit to make the initial hole, but fwiw on thin glass just the 7134 has done great for me.

Joe
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Old 04-05-2006, 07:18 PM   #7 (permalink)
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Oh ok I get the siphon break now I was picturing it on the outside side of the tank and that didnt make sence. I may expirement with heating some rigid airline I have laying around. It is so thin though so its a long shot I fugure I can make something crude but the bent rigid tube sounds like a fun project.

Thanks for the offer on the glass drill bit I would be interested if we both showed up to the meeting, but if you cant come or I dont make it, Iwill just buy one. I can probably talk my dad into buying it for his tool collection anyways.

I did find a galaxy clip on for 17 with out shipping so I am looking into cool containers to use... There are a lot of options.

I think I will use the aqualifter since an OEM peristalic(sp?) pump is like 60 bucks with out shipping.
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