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Old 06-19-2011, 11:55 PM   #21
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the size pump for the skimmer im trying is a petco brand 250 that i use for pwc. the pump that came on the skimmer didnt say what size it was or anything. so i dono
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Old 06-19-2011, 11:59 PM   #22
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i'm not sure, but you could always get a bigger pump and pump more airbubbles into the skimmer
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Old 06-20-2011, 01:02 AM   #23
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thanks. another question i have about drilling. when i drill my return lines how do i make sure it dosnt siphon back to my sump
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Old 06-20-2011, 06:46 AM   #24
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check valves
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Old 06-20-2011, 06:56 AM   #25
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don't trust check valves. they fail. just drill a hole just below the water line in each (inside the DT) so that in the event of a power outage, they returns suck air almost immediately. just make sure they are below the water line or you will get some serious salt creep.

also, purchase a quality pump. a popular pump is a danner mag drive. i happen to like "quite one" pumps. either way, don't buy a rio or some other hoopty. your tank depends on it.
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Old 06-20-2011, 07:22 PM   #26
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ok thanks doug. that would mean i would have to drill the holes for the bulk head close to the rim of the tank is that ok i need the hole to be as high as i can get it
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Old 06-20-2011, 07:42 PM   #27
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you are bringing the returns over the top, correct? i would not drill a hole in a tank that is not needed. drill a hole for the drain, and run the returns over the top. unless you have a rimless tank, aesthetics permits you to run the returns up the back and over and in.
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Old 06-20-2011, 09:41 PM   #28
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thanks i will not drill my returns then that kinds saves me money to
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Old 06-24-2011, 12:42 AM   #29
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go i got a pump today from a guy i bought some live rock from its a mag drive 12.
this thing is powerful. my question is im trying to pick out my glass-holes overflow box and cant decide if i want the 700gph or 1500gph im trying to get 20x per gallon of flow witch brings me around 1200 with the 45 gallons in the tank about 15 in the sump. do i need the 1500 or will the 700 be fine if i back it down with the ball valve???
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Old 06-24-2011, 05:18 PM   #30
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all you need flowing through the sump is enough gph to feed whatever you have in there- a skimmer, a refugium, reactors...all of them don't require a ton of flow.
IMO, 1200 gph through a 15 gallon sump is overkill, and you may be left with a micro bubble problem.
i would go with the 700 gph model for 2 reasons:
1. it is plenty for your system
2. it's half the size of the 1500 gph model, and your tank is small enough to notice the extra space.
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