Spray bar vs loc-line nozzle return?
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Old 03-05-2015, 04:34 PM   #1
FishStix
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Spray bar vs loc-line nozzle return?


My setup is running dual overflows, with returns over the back of the tank with loc-line nozzle returns. I have to make some changes to my plumbing this weekend, and wondering if it just better off to have spray bar, rather than using 2 loc-line nozzle returns? The entire system is on a sump with return pump.

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Old 03-05-2015, 04:37 PM   #2
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I think it all depends on what you want from your system. The spray bar would give a more even distribution of current at a lower velocity while the two separate will allow for more directional velocity.
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Old 03-05-2015, 04:44 PM   #3
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I guess the question is would the spray bar give better balance in regards to flow with CO2 in the tank? I also have 4 power heads in the tank that give a lot of movement, as I was not getting that with just the 2 nozzles.
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Old 03-05-2015, 04:54 PM   #4
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How big of a tank is this? And I'm not sure I understand why your posing this as an either or type question? Couldn't you replace the nozzle on the end of the loc-line with a spray bar instead?
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Old 03-05-2015, 04:55 PM   #5
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Quote:
Originally Posted by FishStix View Post
I guess the question is would the spray bar give better balance in regards to flow with CO2 in the tank? I also have 4 power heads in the tank that give a lot of movement, as I was not getting that with just the 2 nozzles.
Yes, a spray bar would give more consistent flow for CO2.
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Old 03-05-2015, 07:40 PM   #6
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Quote:
Originally Posted by lksdrinker View Post
How big of a tank is this? And I'm not sure I understand why your posing this as an either or type question? Couldn't you replace the nozzle on the end of the loc-line with a spray bar instead?
I have to take apart my returns as one of them has a crack, it custom built as they are over the back of the tank, rather than from the overflow box, since I am running herbie style drain.

I have been using an entire 15 # CO2 bottle in a month, so wondering if it would be better to go with spray bar over the back as my return for better CO2 coverage and overall water movement in the tank.

Right now I have loc line with nozzle, and just wondering if I should switch it over to spray bar. I would have to build it as nothing I can buy that large.
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Old 03-05-2015, 08:02 PM   #7
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If your return is centered on the back wall of the tank I bet a spraybar would work better than locline.
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Old 03-05-2015, 08:21 PM   #8
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If your return is centered on the back wall of the tank I bet a spraybar would work better than locline.
The way it runs now is from my return pump, behind the tank, in the center, then splits off at the top of the tank with a T, and goes to the left and right about 2 feet, and into the tank with loc-line.

So are you saying come up from the center line I am now, then have the spray bar go the entire way on the back of the tank, minus the loc-line nozzle?

How far in the water should the spay bar be?
How big should the holes be for the spray bar and how far apart?

My pump is 3170 GPH, though it turned back a bit with controller.

Thanks
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Old 03-05-2015, 09:33 PM   #9
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+1 for a spray giving good overall circulation and CO2 delivery.

I have 1" PVC coming from the pump and Tee'ing towards two overflows (3/4" PVC) at this point (see pic of 1 overflow).
How long would your spray bar be? Does it make more sense to have two spraybars (for each return), or one?
What is your PVC size?
The hole size and spacing can follow from this information...
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Old 03-05-2015, 09:37 PM   #10
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Quote:
Originally Posted by imcmaster View Post
+1 for a spray giving good overall circulation and CO2 delivery.

I have 1" PVC coming from the pump and Tee'ing towards two overflows (3/4" PVC) at this point (see pic of 1 overflow).
How long would your spray bar be? Does it make more sense to have two spraybars (for each return), or one?
What is your PVC size?
The hole size and spacing can follow from this information...
The flex hose that comes off my pump is 1", which then goes into a T at the TOP and goes to the right and left side of the tank, with the loc-line nozzle. I was thinking if I go spray bar option, I would have same, but spray bar rather than loc line

Mine does not come up from the return, just from behind the tank.

Last edited by FishStix; 03-05-2015 at 09:38 PM.. Reason: .
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Old 03-05-2015, 10:20 PM   #11
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Would you prefer that the Tee at the top center of the tank be removed and replaced with an elbow taking pipe down into the water (effectively removing the pipe going to each loc-line), and then using a tee in the water to have a spray bar running both left and right to the end of each side of the tank?
(in a similar way shown in the picture that an elbow can bring the spray bar down to about 2-4" below the water surface).
This seems the best option to me. How long would each spray bar run be?

Or what other ideas to you have in mind?
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Old 03-05-2015, 10:50 PM   #12
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Quote:
Originally Posted by imcmaster View Post
Would you prefer that the Tee at the top center of the tank be removed and replaced with an elbow taking pipe down into the water (effectively removing the pipe going to each loc-line), and then using a tee in the water to have a spray bar running both left and right to the end of each side of the tank?
(in a similar way shown in the picture that an elbow can bring the spray bar down to about 2-4" below the water surface).
This seems the best option to me. How long would each spray bar run be?

Or what other ideas to you have in mind?
Not really sure about the T, I would like it to go about 25 inches each direction from the middle. The one on that other 180, in tank journals is not bad.

Bump: Also another thing to consider is how will get it in the tank, do I need to glue what in the tank? I have 2 braces, on my tank.
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Old 03-05-2015, 11:16 PM   #13
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No glue is required.

Where does your CO2 get injected?
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Old 03-06-2015, 04:30 AM   #14
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Quote:
Originally Posted by imcmaster View Post
No glue is required.

Where does your CO2 get injected?
Down in the sump, CO2, Needle wheel pump, into reactor, into main pump. Sump is also sealed.
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Old 03-06-2015, 01:13 PM   #15
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Quote:
Originally Posted by FishStix View Post
Down in the sump, CO2, Needle wheel pump, into reactor, into main pump. Sump is also sealed.
Perfect. Wanted to make sure that the CO2 was mixed into the water prior to entering the tank (to make sure the spray bar was delivering the CO2 evenly in the tank).

So your plan is good and you are ready to go? Any last questions for anyone?
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