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Old 03-28-2005, 12:12 PM   #1
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pump size for 125gal fowlr

i bought a 125 w/ dual megaflows. i attached a Mag Drive 2400 and discovered it was waaaay too powerful as it was filling faster than it drained. Should i go with a Mag Drive 1800 or Mag Drive 1200 instead?
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125gal. megaflow. Fish Residents:
Yellow Tang -(Junior), Flame Angel -(Flamey)
Bicolor Blenny -(Butch), Randall Jawfish -(Jaws)
Lawnmower Blenny -(Lenny), Talbot's Damsel -(Dottie), Tomato Clown -(Ketchup)
Nameless fish include, Neon Blenny, Singapore Shrimp Goby, Yellow Tail Damsel, 1 Skunk Cleaner Shrimps, purple pseudochromis.
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Old 03-28-2005, 08:34 PM   #2
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Dual overflow rating is what??? I think there like 600gph each so you would need a pump to do at least 1200 gph right.... i would go with the 1800..
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Old 03-29-2005, 12:18 PM   #3
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I have a 90 gallon with 2 CPR 90 overflows rated at 800gph and a mag 18 return pump and everything works perfectly. There have been times when I ran just a single overflow and it filled up with more water, but it still worked fine. I just prefer to skim from both sides of the tank.
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Old 03-31-2005, 05:39 AM   #4
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go for the RIO HF27
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Old 03-31-2005, 11:55 AM   #5
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I have an oceanic 120g tank with dual overflows. I'm using a mag 1200 on mine (into a T connection and then up to the tank) and even with the 4' head height the running levels are perfect. You could always get an 18 and dial it down a bit with a ball valve if it ends up being too fast.

Good luck.
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