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Old 04-11-2011, 06:22 PM   #1
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Help With Final Plans for Sump

Alright I just modified the stand of a 55 gallon tank to accommodate a sump of 12" wide. This really opens my options and I think I'll be going with a 20 long. Now that I have this plan finalized I can figure out exactly what pump and size holes to drill, etc. I'm thinking a Mag 7 since at 4 feet head height it pumps 480 gph. The 55 gallon tank plus 15 gallons of the sump is 70, I figure I can use a ball valve to restrict flow down to ~360 gph. If that would damage the pump I'm thinking about running a Y and sending some water back to the refugium. If I drill the return at 1/2" I should drill the overflow at the same width right? The bottom of my tank is tempered so I'm drilling in the top sides of the back.

Thanks
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Old 04-11-2011, 06:59 PM   #2
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Also, do I really need to worry about microbubbles? I've been reading mixed results from people using bubble traps and I'm not so sure it's a necessity.
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Old 04-12-2011, 03:38 PM   #3
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Just throttle the pump down,it actually prolongs the life of the pump.If your putting a skimmer in the sump use baffles,
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Old 04-12-2011, 06:45 PM   #4
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Throttle the pump down with a ball valve? Or is there a safer way? And no skimmer, this is on a freshwater setup.
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Old 04-13-2011, 03:00 PM   #5
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ball valve is fine,I'd use the ones made from plastic,or some pumps have a valve on them.
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Old 04-13-2011, 05:04 PM   #6
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Alright here are my final plans, any suggestions or is anything wrong here?

I plan on using 1" PVC for the overflow. I have to use 1/2" flexible tubing for the return because the outlet of the Mag 7 is 1/2". Plus I also have to take a couple of turns so I don't want any hard 90 degree turns to limit my flow. Any ideas for what type of flexible tubing would be best?

I have the display tank at a glass shop getting drilled tomorrow. The guy said he might not have the bit to drill the 1/2" return hole, would I be able to use some kind of adapter and have him drill a 3/4" hole?

Also, it's not in the picture but I'll be putting a ball valve on the return after the pump in case the pump is too strong and the total systems turnover per hour is too large.

Thanks for the help everyone
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Old 04-14-2011, 02:23 PM   #7
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Remember for 1/2 pipe they need to drill a larger size to accommodate the fitting.
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Old 04-14-2011, 03:08 PM   #8
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Could you not bring the return up and through the lid?? Depends on the design, but I know mine has a space for cables which something like that could fit through.

and remember to never submerge the return, because if the pump fails the tank will siphon to the end of the hosing.
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Old 04-14-2011, 03:17 PM   #9
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would definately submerge the return pipe,just drill 2 small holes just below water level.
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Old 04-14-2011, 07:33 PM   #10
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You can use PVC on the return too.. They make a fitting with 1/2" threads and a slip for PVC pipe. I have one on my mag9.5 although mine is 3/4" thread with a 3/4" slip for PVC..

Shane.
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