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Adam Haycock 
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 Topic: Need pump for GIANT skimmer!!
Posted: May 07 2005 at 9:40pm |
I just purchased a used skimmer and I need some help finding a pump. It is an emperor aquatics skimmer and is seriously like 8 feet tall. All I can find on thier website is that it needs 11 GPM @ 10 PSI and that a 3450 RPM pump motor is needed to achieve 10 PSI. I want to just call and ask Emperor Aquatics, but they would probably try and sell me a $1000 pump. Any suggestions?
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Adam Haycock
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Posted: May 07 2005 at 9:43pm |
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Adam Haycock
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Posted: May 07 2005 at 9:47pm |
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The pump curve above is for the Mag Drive pumps. Not sure the specs on the RPM of the mag drives though. Any way to convert head pressure into PSI?
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reptoreef
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Posted: May 07 2005 at 10:09pm |
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Something that will push 990-1360 gph... that's a freakin huge pump!!! I'm not familiar with that style; downdraft, needlwheel, venturi, etc. I would imagine that that skimmer is for around a 600 or so gl tank... for the greenhouse??? Maybe a mag 12 or an 18 if beckett style.
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www.captivereefing.com
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Adam Haycock
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Posted: May 07 2005 at 10:23pm |
Its venturi.
http://www.emperoraquatics.com/commfoamfrac.phpf
I think its rated for a 1500-2500 gallon system.
I was thinking mag 18 but not sure if it can create the 10 PSI needed to function properly.
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Adam Haycock
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Posted: May 07 2005 at 10:25pm |
Yeah, its for the greenhouse system. I also have a huge fluidized bed filter and a 250 watt UV sterilizer that I might hook up.
Im pretty sure the fluidized bed filter needs a mag 24
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reptoreef
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Posted: May 07 2005 at 10:40pm |
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Holy crud... that's some power... IMO, I've read on numorous occassions that for the best water flow through a skimmer, that the volume pumped through the skimmer be 1.5 - 2x's the total volume to be skimmed. IMO, the mag 18 should do the trick and achieve the psi needed. BTW, I also feel that it's best to over estimate the manufacturer's "max volume abilities" by 50 to 75%(if rated for 2000 gl, figure a true 1000 to 1500... of course, bio-load will also be a big issue. If you feel that you need additional foam production, there are several things you can do (DIY style) that may help to give your new skimmer a boost for a larger bioload.
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scubadave
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Posted: May 07 2005 at 10:40pm |
Magnetic Drive Pump, Power Rating 1/2 HP, Voltage @ 60 Hz 115/230, Current Rating 11.6/5.8 Amps, Outlet 3/4 Inch MPT, Inlet 1 Inch FPT, Maximum PSI 22, Maximum Head 51 Feet, Motor Enclosure TEFC, Maximum Temperature 200 F @0 PSI, 150 F @ 40 PSI, Water Flow @ 6 Foot of Head 38.0 GPM, @ 9 Feet of Head 36.2 GPM, @ 15 Feet of Head 34 GPM, @ 18 Feet of Head 33.1 GPM, Height 7 Inches, Length 15 1/4 Inches, Width 8 3/4 Inches
How does this fit the bill?
$ 150.00 (used in great shape though)
To noisy for family room but would work fine for your needs.
Moves some serious water !!!
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My Tank
220 Reef
4-400 watt metal halides
2- 72� V.H.O.
2- 1200 GPH Pumps
My Pride & Joy
Tremonton,Utah
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reptoreef
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Posted: May 07 2005 at 10:49pm |
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Heck yea... if too powerful, you can tee off for the over flow via gate or ball valve to relieve the excess pressure... good idea Scuba and saves some $$$$. With that venturi manifold... you should be golden.
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jfinch
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Posted: May 07 2005 at 10:50pm |
Head (in feet) = pressure (in psi) x 2.31 / specific gravity (water=1)
So 10 psi is 23.1 feet and 11 gpm is 660 gph. None of the mag-drive pumps will work, not even the MD36.
Here's the Iwaki curves:
You're looking at either the Iwaki 70 or 100.
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Corey Price
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Posted: May 07 2005 at 10:52pm |
Ok, my fluid mechanics are a bit rusty, but it's probably "ok" to say that a foot of head is equal to 1/2 psi. So, 20 feet of head is about 10 psi, give or take a little. Take a look into an Iwaki/Blueline 70- they will flow about 15 gpm @ 20 feet of head pressure, according to their pump curves. Expect $275~$300. They use about 290 watts.
It's just a thought.
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Corey Price
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Posted: May 07 2005 at 10:53pm |
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Hah! I was writing and then Jon wrote the same thing!
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jfinch
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Posted: May 07 2005 at 11:36pm |
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Oh, scuba dave's pump would work too.
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Adam Haycock
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Posted: May 07 2005 at 11:39pm |
I knew you guys would be able to help me  Hey Dave, what brand is that pump? hmmm it looks like it has enough power.
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Adam Haycock
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Posted: May 07 2005 at 11:46pm |
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I'll take it then. Im busy at work, but ill PM you in a bit
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Adam Haycock
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Posted: May 07 2005 at 11:58pm |
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Powerful enough to run both the skimmer and the fluidized sand bed? They say the fluidized sand filter needs to have 18 GPM at 10 feet of head.
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scubadave
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Posted: May 08 2005 at 12:20am |
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My Tank
220 Reef
4-400 watt metal halides
2- 72� V.H.O.
2- 1200 GPH Pumps
My Pride & Joy
Tremonton,Utah
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derikhills
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Posted: May 12 2005 at 12:28pm |
Hey BananaTropics can I make a request for updated photos of the greenhouse system, also I would be interested in hearing how the temperature does as the weather starts to warm up
Thanks
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Adam Haycock
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Posted: May 16 2005 at 12:10pm |
Derik, sure i'll update it now. I just got back from Washington and got a bunch of cold-water inverts and algae. I'll post some pics on my "greenhouse aquarium" thread. 
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Adam Haycock
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Posted: May 26 2005 at 11:13am |
Dave, the pump is working great! It easily creates 10PSI for the filter with plenty of left over thats directed into the display tank. The skimmer collected about 5 gallons of brownish foam in the first 20 minutes or so. Id say my tank needed this pretty bad. Thanks to everyone for the help.
Edited by BananaTropics
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