Flow in a 2000 gallon Deltec tank

Arnar

Arnar

Premium Member
Hey there.

Im just days away to ordering a 2.000 gallon Deltec tank but im not sure on how I would like to deal with the flow in the tank. I've been trying to get some input from Deltec in germany trough the dealer here but It's taking way too long and is not really giving me any clear answers. I have to decide on which holes to drill before I ship it over here to Iceland.

I've been thinking about using closed loop and I was hoping someone here on RC could maybe help me come up with some solutions.

The tank is : 15foot x 5.5 foot x 35.4 inches. | 500cm x 170cm x 0.90cm.

The tank is viewable from all angles and there will be 2 overflows in the corners which face the wall. Each overflow will have one 2" return and 2x 2" drain. There will be a remote fishroom in the corner.

I was hoping to avoid drilling the bottom and maybe taking the pipes trough the overflow.

What do you guys think ?

Thanks !

sketch1.jpg
 
Flow on a tank that big is going to require serious water movement. What do you intend to keep? Will you have a sandbed? I would go with at least 4xTunze 6200s on a 7500 controller or you could go with two closed loops going to two sequence hammerhead pumps returning through Oceans Motions 4-ways with some serious plumbing.
 
<a href=showthread.php?s=&postid=9253947#post9253947 target=_blank>Originally posted</a> by keeperofthefish
Flow on a tank that big is going to require serious water movement. What do you intend to keep? Will you have a sandbed? I would go with at least 4xTunze 6200s on a 7500 controller or you could go with two closed loops going to two sequence hammerhead pumps returning through Oceans Motions 4-ways with some serious plumbing.
Click to expand...

4x 6200 = 21120
2x Hammerhead = 11600

that's 32720 total turnover (if all 4 tunzes are on full blast all the time)

That's only 16.36 times turnover.... you're gonna need WAY more than that. I'd be looking for some 1 HP pool pumps that are salt water rated... I know there is someone here who can point you in the right direction but it's pretty clear that traditional powerheads are not going to cut it in an application this large.
 
In my 500 I run (4) 6200's on a multicontroller. With Hammerhead on CL. And (2) 100 Iwaki's, and (3) 70 Iwaki's. All running thur 1" Seaswirl's. It' only gives me about 35 - 40 per hour turnover. If you are going to keep SPS you will need some serious flow.. How's your electricity costs in Iceland??? I run about 275.00- 300.00 per month for my 500. Include all the salt, additives, equipment replaced, lights etc. over the year and system cost around 500.00- 600.00 a month. Not only should you worry about flow. But what about lighting? I run (6) 400watt halides, (4) 160 watt VHO atenics and (4) 96 watt PC's. Not to mention (2) 175 watt halides on my fuge.. Large systems take LOTS of money to operate....

Happy Reefing...
 
Thanks a lot for your answers and interest !

There will be a shallow sandbed or enough to cover the bottom and pipes and probably a deep bed in the fishroom. I'm thinking about using 2x10.000 liter sequence pumps for the closed loops and there will be a 24.000 liter pump for the return from the sump. I

We already have 4x tunze 6200 kit with the controller and they say that the specs for each pump is 4,000 to 12,000 l/h (1,056 to 3,170 US gal./h). So those pumps should give us about 48.000 liters max. We might buy four more If needed but I wanted to keep the tank as "tidy" as I could.

So total flow with 2xCL, 1xReturn and 4xTunze would be 92.000 liter max. (24.300 gallon)

Here is a drawing to explain what I'm thinking about in the plumbing department. like that Loc-Line pipe system and I think it would be ideal for closed loop and return from sump.

<a href="http://www.ink.is/2000/setup.gif"><img src="http://www.ink.is/2000/setup.gif" width="20%" border=0></A>
Click for larger image


Ricks was asking about lighting. Here is a pic of what I plan for lighting. I will be using Lumenarc 3's reflectors, 10K Mh's on E-ballasts.

<a href="http://www.ink.is/2000/lights.gif"><img src="http://www.ink.is/2000/lights.gif" width="10%" border=0></A>
Click for larger image


<a href="http://www.ink.is/2000/bur.wmv">Here is a little 3d movie for fun ;)</a>


So... any comments ? :D
 
Headless_donkey: Thanks. I used Google's Sketchup and 3dstudio

tagraham: All filtration will be in the fish room. I'll put more info on the filtration soon.
 
As you said Closed loops are almost mandatory for a tank this big. Have you ever thought about doing some sort of surge device?
 
Mr.Furious: I might install a surge device when the tank is installed and I see how the flow turns out. I've never had something so big to play with so I'm not 100% sure on how much I really need :) I'm deciding where I want the holes to be drilled so I can finally order the tank and I think I have it nailed down now so I will probably place the order early next week unless someone here sees a big problem in my design :)
 
Have you given any consideration to the overall weight of the aquarium and if the floor it will be sitting on will not have any issues supporting it.
 
Yes a lot of consideration has gone into weight issues and we have had a structural engineer take that into account. The tank is on a second floor in a building that once housed some sort of fishing industry which usually has heavy machinery so I think it is quite strongly built with thick concrete. We are going build the tank stand so it distributes the weight evenly along the the floor.
 
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