Question about canister filter intake - The Planted Tank Forum
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post #1 of 8 (permalink) Old 05-10-2020, 06:44 PM Thread Starter
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Question about canister filter intake

Hey everyone,

I'm working on setting up a standard 90 gallon tank that came with 1.5" bulkhead holes drilled in the back. I picked up a Fluval FX5 and want to utilize the holes for a nicer presentation.

My question is; can I plumb a 1.5" intake tubing and 1.5" return spray bar into the tank or should I downsize it to 1" tubing to maintain flow rates? I figure that the FX5 tubing is 1" ID and therefore the flow at the intake and return will be lower as the tubing diameter is increased. I'm including a sketch so it makes more sense.

https://drive.google.com/open?id=1er...BXeWFq7B2R6DJ7

Also, Where should I downsize the 1.5" tubing outside the tank to fit a 1" barb adapter? I can do it in spots A or B on the below diagram. The last question is; what is the best option for injecting co2? Can I simply drill a hole and add a brass barb fitting into the return to come out the spray bar? Or would it be significantly more efficient add an in-line reactor?

https://drive.google.com/open?id=1P_...23aeSw6Q4HYvf_

Thanks!
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post #2 of 8 (permalink) Old 05-11-2020, 03:41 PM
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Personally, I would just reduce via the appropriate 90 fitting. I'd also add an inline reactor for CO2.
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post #3 of 8 (permalink) Old 05-11-2020, 04:12 PM
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Yeah I would put a 1.5" to 1" reducer at point A right after the tank, then a ball valve, and then use the barb fitting.
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post #4 of 8 (permalink) Old 05-11-2020, 06:24 PM
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Quote:
Originally Posted by monkeyruler90 View Post
Yeah I would put a 1.5" to 1" reducer at point A right after the tank, then a ball valve, and then use the barb fitting.
Ball valve is a good add. With that in mind, I'd go this route: Bulkhead>Reducing bushing>elbow>Ball valve>1" barb. Mix and match slip and thread fittings as you prefer.
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post #5 of 8 (permalink) Old 05-12-2020, 11:51 AM Thread Starter
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Thanks everyone. I'm guessing the same goes for inside the tank with regards to the intake and spray bar. I wanted to use black fittings for this side but can't find any 1" ABS or PVC elbows.
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post #6 of 8 (permalink) Old 05-12-2020, 01:28 PM
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Thanks everyone. I'm guessing the same goes for inside the tank with regards to the intake and spray bar. I wanted to use black fittings for this side but can't find any 1" ABS or PVC elbows.
I just paint the white PVC with black spray paint, works fine. Just make sure to use the right paint. This is what I use.

https://www.homedepot.com/p/Rust-Ole...4020/307244849

Disclaimer: I work for the company that makes the paint.

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post #7 of 8 (permalink) Old 05-14-2020, 01:27 PM Thread Starter
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I just paint the white PVC with black spray paint, works fine. Just make sure to use the right paint. This is what I use.

https://www.homedepot.com/p/Rust-Ole...4020/307244849

Disclaimer: I work for the company that makes the paint.
For whatever reason I was trying to avoid this at all costs but it seems more reasonable now. I'll just pain the damn PVC.
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post #8 of 8 (permalink) Old 05-14-2020, 01:31 PM
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For whatever reason I was trying to avoid this at all costs but it seems more reasonable now. I'll just pain the damn PVC.
It's pretty easy to do and widely done. The hardest part is waiting for the paint to dry. I hate getting into a project, then having to stop.

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