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Old 09-05-2013, 10:02 PM   #1
Italionstallion888
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DIY spray bar


I've done some research on here and various other forums. I can't come up with a solid answer to my question.

I have a Fluval 305 with the stock outlet on my 50 gallon. I have several dead spots in the tank I want to get flow to. I have plenty of pvc and parts to make a spray bar. I've read that a diy spray bar on a 305 will cause the motor to go out due to back pressure issues. I really don't want a power head nor an additional filter at this time. Going for cheapest possible at this time. Am I going to be ok putting a 24 inch spray bar on my 305 using 1/2 pvc?
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Old 09-06-2013, 12:16 AM   #2
tattooedfool83
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From my understanding you would only burn the motor out if you limited flow going into the filter not going out. And I did a 44" DIY spray bar for my 75 and my suggestion is to start out with less holes in the spray bar and add more as needed as its easy to add them but you can't take them away. And also I'd suggest to have each hole pointed a little up and then a little down as to get surface agitation and then flow downward as well
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Old 09-06-2013, 12:28 AM   #3
s3rca
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I'm running a 42 inch or so spray bar on my 305 and I haven't noticed any issues.
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Old 09-06-2013, 01:09 AM   #4
Italionstallion888
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Thank you, I'm going to proceed with my idea.
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Old 09-06-2013, 08:44 PM   #5
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It's probably a little late, but here goes anyway.

Two things come to mind. First, if you were concerned with the back pressure being an issue, all you'd have to do is either put enough holes and/or make the holes large enough to handle the complete amount of water the Fluval is pushing out.

Second, I don't see how limiting the output with a spraybar would be any different than using the flow control built into the canister. That would make my first suggestion mostly irrelevant, but personally I generally don't run my 305 at half capacity so I would want the full flow potential in the spraybar.
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Old 09-06-2013, 08:46 PM   #6
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Quote:
Originally Posted by bandit1200 View Post
it's probably a little late, but here goes anyway.

Two things come to mind. First, if you were concerned with the back pressure being an issue, all you'd have to do is either put enough holes and/or make the holes large enough to handle the complete amount of water the fluval is pushing out.

Second, i don't see how limiting the output with a spraybar would be any different than using the flow control built into the canister. That would make my first suggestion mostly irrelevant, but personally i generally don't run my 305 at half capacity so i would want the full flow potential in the spraybar.
+1^^^
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Old 09-06-2013, 09:14 PM   #7
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Right now I have it on the 4.5 slot. I figured with 1/2inch pvc it would be ok. I have a feeling I'm going to have to make more than one until I have all areas of the tank covered. I measured last night and it will be 2 ft 7in total. Will a zip tie secure the hose on the pvc? I don't want to glue until its right. I plan on doing holes 2 inches apart in two rows. One up and one down ish. What size drill big should I use?
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Old 09-07-2013, 03:11 AM   #8
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Ever though of using Modular Hose
http://www.modularhose.com/Loc-Line-...Loc-Line-51837
I use the gray color pvc with the thread end {my hare ware store carried all sizes up to 48in} I installed a black threaded cap and screwed into gray pvc threaded elbows up and over the tank , my tank was 60in long and work well!
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Old 09-10-2013, 11:48 PM   #9
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Looks pretty cool, but pricey. Looks like 7" worth of spraybar would run you about $22 plus shipping
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Old 09-10-2013, 11:55 PM   #10
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Quote:
Originally Posted by Italionstallion888 View Post
Right now I have it on the 4.5 slot. I figured with 1/2inch pvc it would be ok. I have a feeling I'm going to have to make more than one until I have all areas of the tank covered. I measured last night and it will be 2 ft 7in total. Will a zip tie secure the hose on the pvc? I don't want to glue until its right. I plan on doing holes 2 inches apart in two rows. One up and one down ish. What size drill big should I use?
Without getting into a lot of stuff that I only know enough to be dangerous with, I'll say this: Start small and try it out. You can always make the holes bigger if you need to. Also, the pressure will tend to be higher closer to the filter side of the spraybar, so you may want to experiment using larger holes farther away from the connection to even out the output.

Hopefully that last part made sense. It did in my head, but you know how that goes.
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Old 09-11-2013, 12:17 AM   #11
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It did, I started with two rows of holes. The "top" row is staggered from the bottom angled upwards best I could get it. This attempt was 1.69 worth of materials and I have enough to try a few more designs.
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Old 09-12-2013, 12:18 AM   #12
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Version 1

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Old 09-12-2013, 12:38 AM   #13
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Looks good to me.
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Old 09-12-2013, 12:50 AM   #14
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I'm going to try another one with fewer holes and better direction. I'm going to try and grove it out.
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Old 09-12-2013, 01:07 AM   #15
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Get any surface agitation with it?
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