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Old 12-14-2004, 09:31 PM   #1
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Maxi-Jet powerhead question.

Just wondering how some people have this set up in their tank. Should I use the venturi attachment? or just push straight water? what way should i have the water flowing? left to right ,right to left. 1 pointing left the other right??????? I got two maxi-1200's

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Old 12-14-2004, 09:55 PM   #2
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Don't use the venturis...the salt creep they cause will drive you crazy. Most folks position the PH's so that their current collides. A common arrangement is to have one at each end of the tank pointed at each other. You could add a third on the back wall of the tank with the flow angling across toward the front glass. What you want is turbulence rather than just straight flow.
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Old 12-17-2004, 12:44 PM   #3
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Do you need to use the screen intakes on them or can you avoid these too?
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Old 12-17-2004, 01:01 PM   #4
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I would use the screens to prevent your smaller fish from getting sucked in to them. It also prevent food, and other large particles from getting in there as well.

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Old 12-17-2004, 01:17 PM   #5
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Ok thanks, It just seems like they slow the flow and seem to creat tiny air bubbles every so often. Maybe I will try the foam filter screen ones Holes are a little larger.
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Old 12-17-2004, 01:20 PM   #6
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I used the foam in the beginning, but I always had to clean them like every 3 weeks because of algae and food particles blocking the flow. I just use the screen piece it came with and works great.

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Old 12-17-2004, 11:06 PM   #7
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should the deflectors be left on? i read somewhere (i think it was on this forum) that the deflectors should be pointed slight upwards to help with surface oxygenation.

also, i have my PH's mounted to the tank with the overhang clips. should the PH's be mounted this high in the tank or should i use the 3 suction cups and mount lower.
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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
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Approx. 200lbs Sand (3-4" DSB)
RO/DI unit - 110 GPD

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Old 12-18-2004, 12:17 AM   #8
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As long as you have decent surface agitation, you don't need to use the deflectors. They are handy for directing the current where you want it though. If you start to get some cyano on the sandbed, you can angle some current down towards it...cyano doesn't like flow much. There is no problem with having the PHs mounted up high. MJ1200 generate enough current to move all the water around in a 75g no matter what level they are. The suction cups, although they are some of the better ones available, will eventually harden and start turning loose. You wouldn't believe what a mess an MJ1200 will make when it falls into the sandbed and runs all night! I'd stick with the clips for that reason if for no other.
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