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Old 04-25-2011, 03:05 PM   #1
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scottayy's cheap DIY sump thread

Hey Guys,

I'm going to build me a sump. I think it sounds like a fun, easy, and practical DIY project. I'm also going to do it cheap (adds to the funness). Going to see how cheap I can do it while still being very effective.

I'll update this original post with pictures as I go along.

Equipment



Skimmer (lip cut off of top of sides of 3 qt containter, plus teeth cut)



Added the top for stability (these containers were quite flimsy) and put in a hole for the siphon tube:



Overflow box, with DIY bulkhead, pvc pipe, and elbow. Hole cut in top for siphon tube and a hole for air relief.



Box where water will come in. It will be gravity fed through a cut filter cartridge or a sponge or something.




.. Continued in post 2 (8 image limit)
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Old 04-25-2011, 03:07 PM   #2
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Sump containers hooked together



Equipment list and pricing
-------------------------------
3 x 31 quart plastic bins - $20.91 (could've got this cheaper, lowes was out of what I wanted)
3 x 3 quart plastic bins - $3.51
2 x 5' 3/4" pvc pipe - $2.64 (again, could've got this cheaper, but lowes was out of $1.98 10' pipes)
2 x 3/4" female bushings - $0.66
2 x 3/4" male bushings - $0.66
3 x 3/4" elbows - $1.02
silicone sealant - $3.98
rubber siphon tube - $2.62

Total: $36.45
x 0.07 sales tax
-------------------
$38.90




My first question would be the size of the PVC pipe to use. I have a 55 gallon tank, and I read that I'll want to turn it over about 10 times per hour.

According to this I'll want to be at about 1/2" to 3/4".

I was thinking about getting the 1/2" so the flow will be a little lower than 10x per hour.

Thoughts on pipe size?
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Old 04-25-2011, 03:15 PM   #3
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Just following wanna see how this comes out!
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Old 04-25-2011, 03:15 PM   #4
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Is your tank drilled, or are you using a siphon overflow? If it is drilled or a "reef ready" tank, then I'd go with 1 to 1.5 PVC because your return pump will dictate the amount of flow through the sump. If it's a siphon then someone else will need to chime in - because you'll have to synch your siphon with your return pump. That was too much trouble for me so I drilled my tank.
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Old 04-25-2011, 03:20 PM   #5
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My tank is already running and established. I'm going to do the siphon method.
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Old 04-25-2011, 03:21 PM   #6
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Old 04-25-2011, 04:37 PM   #7
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1/2" pipe takes 420gph,3/4" takes 660gph,As tjm has stated you need to match your pipework to your overflow box and your pump to the overflow box.So if you do use 1/2" then 420gph is the maximum pump flow including head loss on the pump.make sure the overflow box can take just slightly more than 420(maybe 450gph)or you can run into problems.
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Old 04-25-2011, 04:39 PM   #8
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Umm what is head loss? Thanks, I'm along for the ride here LOL
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Old 04-25-2011, 04:49 PM   #9
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I'm assuming head loss is where the water slows such as hitting an elbow and flowing through the sump.

The gallons per hour would be if it were flowing through a straight pipe, so loss occurs where it slows.

I got my equipment (most of it). I think the cheapEST part is out of this (though it will still be cheap).

I saw 6 gallon containers for $3.98 online. The store only had 7 gallon containers for $6.98 I got 3 of them so that part was $21.. but on the bright side, 21 gallon sump!

Pictures soon
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Old 04-25-2011, 05:20 PM   #10
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Updated with picture of equipment plus pricing. Still don't have all of the parts (like suction cups).

On a side note, what can I use to stick the HOB box to the back of the tank? The background will be in the way.
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