New tank.

[Below Sea Level]

cool! I am glad you didn't have the same bad experiences a lot of other folk are having.

Dave

 

[SNAKEMANVET]

tank looks real nice, can't wait to see what the whole setup looks like .

 

[fishdoc11]

Nice

 

[bshumake]

Oooooo

 

[JustOneMoreTank]

It is difficult to tell from the picture but do you think that the overflow teeth are going to flow enough? I would guess that you would want two overflows on a 120g tank with a longer area of overflow. The longer the area of overflow the thinner the "slice" of dirty surface water gets skimmed from the tanks surface.
Depending on what size return pump you are planning on using will of course make a big difference in the ability of one smallish overflow's ability to keep up.
Just my two cents. The tank does look nice in spite of the bad press that I have read ???

 

[just dave]

I think Richard is planning on using closed loop pump(s) for the primary circulation needs and a smaller pump to process the water to the sump. IMO this is a better way to go vs. having a massive return pump.

 

[Rendos]

Yes, I am planning a small pump (600 GPH) for water to the sump, and a 3600 GPH pump on a closed loop.

 

[just dave]

<a href=showthread.php?s=&postid=6933418#post6933418 target=_blank>Originally posted</a> by Rendos
Yes, I am planning a small pump (600 GPH) for water to the sump, and a 3600 GPH pump on a closed loop.

Go watch a movie, it's been covered.

 

[JustOneMoreTank]

Ahhh yes I see about the lower flow return. The overflow slots should work fine then. Let us know.
That RK2 controller looks really nice. Great work on the stand by the way.

 

[Rendos]

Thanks for the compliment.
Here are some updated pics. I finished everything except for plumbing the refugium. That should take like 10 minutes. Anyway...on to the pics...
Empty tank on stand.

Filling it and water testing.

Sump and fuge.

Closeup of closed loop pump running.

 

[Rendos]

External overflow.

Closed loop pump on shelf behind tank to minimize head loss.

 

[JustOneMoreTank]

Water test looks like it went well. The tank is going to look really nice I can tell already.
Interesting that you put the CL pump on a shelf behind the tank.

Closed loop pump on shelf behind tank to minimize head loss.

I understand that it doesnt matter where the Closed Loop pump is located vertically in relation to the tank... the head pressure will be zero because it is taking water and replacing water from the same container with the same height from the ground.
I have my Closed Loop pump nearly on the floor behind and under my tank and I don't believe that the pump "sees" any head loss due to the change in height. There will be some loss in flow due to pipe diameter friction and the necessary plumbing (sweeps, elbows, true union ball valves, T's, etc).

 

[Rendos]

I hear the same thing about head loss in a closed loop, but call me stupid...I don't understand it. If the pump has to push water upward against gravity...there has to be head pressure. Maybe I am wrong, but it doesn't make sense to me.

Even if it is true (whether I understand it or not) I like having the pump where it is...makes for very simple plumbing, and easy access. My stand will be full enough as it is without having another pump under there.

Thanks for the comments though...maybe one day someone will explain to me how that all works in terms that I can understand.

 

[smbkmb]

is that black hose like a auto top of or what?

 

[turboex901]

looks great richard, im looking very forward to seeing it in person if the invite is there <~~steve

 

[cateyes]

finally some pics!!!!!

it's really lookin' good, i like the external overflow,, it leaves all the area inside the tank for you to play with...

so you have one hole in the back of the tank for a CL intake, what type of screen are you going to put over the hole on the inside?? will there be a lot of suction created by that pump?

you have two different colored unions on either side of the pump, one grey one white,, are they different "types"?

 

[bshumake]

I take it that CL is gonna run all out. Is it all gonna converge dead center like that, is that CL dipping in back there, can I borrow $100.....

 

[boofer]

Richard, with a Cl your pulling water in and returning it at basically the same height is why theres no head loss. With a pump in the sump, the pump works harder to push the water back up to the tank (against gravity). In a CL, You still have the friction loss of the pipe and fittings, but not the head loss. Gravity isnt a factor because its coming in and out at the same level. Its basically just recirculating the water in a loop is all.
Looks good BTW

 

[Rendos]

Steve - anytime you want to come over, you are welcome to come. I will be installing the 120 in two weeks. Anyone who wants to come help with the move is welcome to come.

Lisa - Thanks. The only reason I have any pipe/fittings that are not in grey or black is that Savko was out of certain parts, and I didn't want to wait anymore.

Barrett - slow down...too many questions.
The CL will be aimed differently...that was just for testing.
The CL pipe is dipping slightly...thanks for noticing and pointing it out.
$100 - NO.

Dustin - if my closed loop pump was on the floor of the stand, there would be nearly 5 feet of difference between where the water entered the pump and where it exited back into the tank. That is why I put it on a shelf on the back of the stand...to eliminate the head pressure. Does that make sense?

 

[willember]

I think the easiest way to understand the CL/head pressure thing is to imagine it in with the pump turned off, but with the pipes full of water. In a return pipe from a sump, gravity will push all the water down back into the sump. that is what the pump is fighting and is called head loss. In a CL the water in the pipes would only drop to the intake level. Even if the pump itself is 50 feet below.