Can a UV sterilizer be mounted horizontally over a sump?

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So if I mainly want this for algae control, the directions seem to say I need higher flow than my 240gph return pump. Is this really the case? My tank is 40g so my pump is 4-5x turnover. Also, will the sterilizer kill bubble algae or aptasia spores that are released into the water column?
 
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So starting to think about where to place it. Right now this is the only configuration that I can get to fit.
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Mine is not plumbed into the return. I just have a sicce pump dedicated to the UV, with an Apex flow meter in the UV output line to make sure the flow stays at the desired rate. Much simpler this way …
 
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Mine is not plumbed into the return. I just have a sicce pump dedicated to the UV, with an Apex flow meter in the UV output line to make sure the flow stays at the desired rate. Much simpler this way …
Do your input and output both come from the same chamber in the sump? I’ve worried that if I put a higher gph pump in the sump for the uv unit that it would drain the water from the chamber it was in unless the output was in the same one. But then would I be resterilizing the same water? Does that make sense?
 
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Mine is not plumbed into the return. I just have a sicce pump dedicated to the UV, with an Apex flow meter in the UV output line to make sure the flow stays at the desired rate. Much simpler this way …
Thanks! So if I have 3/4” plumbing, which size of the Apex flow meter do you recommend?
 
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1651935178794.jpeg

57 watt inline with return. 1.25” on the in and out.

Helpful to mount front-back for easy bulb changes/ cleaning.
Thanks! I wish it would fit front to back but the cord to the ballast sticks out too far. If I plumb it with tubing I can easily remove it to change the bulb. Can you tell me what fitting you used to conn connect the tubing to the pvc pipe? I think it’s something like what I have on my return pump but I don’t know what it’s called. I really appreciate your help!
image.jpg
 

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Actually I measured the return pvc from the outside instead of the inside. It’s 3/4”
The options for Apex flow sensors is 1/2", 1" and 2". Don't go down in size. I would get the 1" and then adapt to your plumbing.

Thanks! I wish it would fit front to back but the cord to the ballast sticks out too far. If I plumb it with tubing I can easily remove it to change the bulb. Can you tell me what fitting you used to conn connect the tubing to the pvc pipe? I think it’s something like what I have on my return pump but I don’t know what it’s called. I really appreciate your help!
image.jpg

In my setup I have:
Return pump (COR 20) -->BSPP to 1.25" slip union (included with COR)--> 1.25" spigot to 1.25" hose barb (link)--> 1.25" soft silicone tubing (link)--> 1.25" hose barb to 1.25" spigot--> 1.25" slip to 2" spigot adapter (link)--> 2" AquaUV union (link) --> UV Sterilizer
 
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The options for Apex flow sensors is 1/2", 1" and 2". Don't go down in size. I would get the 1" and then adapt to your plumbing.



In my setup I have:
Return pump (COR 20) -->BSPP to 1.25" slip union (included with COR)--> 1.25" spigot to 1.25" hose barb (link)--> 1.25" soft silicone tubing (link)--> 1.25" hose barb to 1.25" spigot--> 1.25" slip to 2" spigot adapter (link)--> 2" AquaUV union (link) --> UV Sterilizer
This is terrific! Thanks so much!
 
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The options for Apex flow sensors is 1/2", 1" and 2". Don't go down in size. I would get the 1" and then adapt to your plumbing.



In my setup I have:
Return pump (COR 20) -->BSPP to 1.25" slip union (included with COR)--> 1.25" spigot to 1.25" hose barb (link)--> 1.25" soft silicone tubing (link)--> 1.25" hose barb to 1.25" spigot--> 1.25" slip to 2" spigot adapter (link)--> 2" AquaUV union (link) --> UV Sterilizer
What is BSPP?
 
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