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Old 09-17-2004, 09:49 PM   #1
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how do i figure out powerhead flow?

i have a 75gal tank. how do i know how many powerheads to use and how many gph for each powerhead? i am also planning on using a sump return pump (btw, how do i know what capacity return pump to purchase).

let's assume for now that tank will be setup for FOWLR.

also any suggestions on brands/model and why would be appreciated!
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SW - 75 gal
Amiracle SL-350 Wet/Dry (no bio-balls)
AquaC EV-180 Skimmer w/Mag 7
2ea Maxi-Jet 1200 & 2ea Maxi-Jet 900 PH
Captive Purity Refractometer w/Calibrator
LCD Digital 250 W Titanium Heater
48in Coralife 4x65 watt PC
Won Pro Heat II
Tunz level alarm
Approx. 200lbs Sand (3-4" DSB)
RO/DI unit - 110 GPD

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Old 09-18-2004, 12:13 AM   #2
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ok, reading some other posts, i see that 10 to 20 times is about right.

any recommendations on brands/models?
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SW - 75 gal
Amiracle SL-350 Wet/Dry (no bio-balls)
AquaC EV-180 Skimmer w/Mag 7
2ea Maxi-Jet 1200 & 2ea Maxi-Jet 900 PH
Captive Purity Refractometer w/Calibrator
LCD Digital 250 W Titanium Heater
48in Coralife 4x65 watt PC
Won Pro Heat II
Tunz level alarm
Approx. 200lbs Sand (3-4" DSB)
RO/DI unit - 110 GPD

Please feel free to advise me!
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Old 09-18-2004, 12:23 AM   #3
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Maxi-Jet for the PH's and for a in sump return pump, Mag's are good.
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Old 09-18-2004, 12:36 AM   #4
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I prefer to use more smaller ph's instead of less larger one's. You can get a more creative random current with multiple heads. For a 75g, 3 ph's would be better than 2.
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Old 09-18-2004, 10:25 AM   #5
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On my 75 gal I have two Hagen 802 powerheads one on either back corner blowing toward the middle front. They alternate on/off every 10 minutes with a timer. Each of these puts out close to 400GPH. I couple this flow with the flow of my Mag7.5 from the sump.
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Old 09-18-2004, 10:48 AM   #6
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I have a 72 gal. with two Maxi-jets 1200 (300 gph) and return flow from my sump with a Mag 7. It seems to create enough flow...Lando
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Old 09-19-2004, 02:27 AM   #7
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fishfreak,

i took your advice and got the same pumps. i like the idea of a timer to alternate pumps (and save electricity).
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SW - 75 gal
Amiracle SL-350 Wet/Dry (no bio-balls)
AquaC EV-180 Skimmer w/Mag 7
2ea Maxi-Jet 1200 & 2ea Maxi-Jet 900 PH
Captive Purity Refractometer w/Calibrator
LCD Digital 250 W Titanium Heater
48in Coralife 4x65 watt PC
Won Pro Heat II
Tunz level alarm
Approx. 200lbs Sand (3-4" DSB)
RO/DI unit - 110 GPD

Please feel free to advise me!
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Old 09-20-2004, 09:12 PM   #8
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Good idea! What kind of timer are you using?
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Old 09-23-2004, 12:23 PM   #9
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Fishfreek,

Like rdefino said, What kind of timer are you using?
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Old 09-23-2004, 12:36 PM   #10
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Probably just a cheap timer form wally world. You can get a digital for around $14 or the other non-digital for around $6.
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