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Old 02-07-2013, 11:48 PM   #1
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Flow in my tank

I need some help on where to place my JVP-102 power heads. I read the rule is 4 xs per hour turn over. So for a 120 gallon tank it should be a power head of 480 correct?

If so, I have 2 of these JVP-102s which are suppose to push 1300 gph. But I see dead spots in my tank and I'm currently battling an outbreak of hair algae.

Hence the question of placement within my tank. Any pics with explanations would be greatly appreciated. I plan on shutting it down scrubbing the rock and cleaning out some of the sand.

So, when I fire it back up in a few hours after cleaning I'd like to get the best flow to help keep things from having dead spot to help in keeping this stuff from being able to settle (as much as I can that it).
Thanks
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Old 02-08-2013, 12:28 AM   #2
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It is more like 30-40 times turn over per hour.

I have 2 1500 Evos in my 90 gallon
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Old 02-08-2013, 12:40 AM   #3
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So, should I purchase a couple more power heads then? I was hoping these 2 would do the trick.
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Old 02-08-2013, 12:50 AM   #4
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You'll want min 3600gph total flow through that tank. That should include return line after head loss if you have sump.
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Old 02-08-2013, 01:09 AM   #5
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Ya your way under where you should be. I personally like to stay on the high end of 45-50x but I don't really keep much in the way of softies either. For your size tank you should be looking at around 4-5000 gph flow which if you can afford it the perfect solution would be dual mp 40s alternating.
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Old 02-08-2013, 11:38 AM   #6
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Ya your way under where you should be. I personally like to stay on the high end of 45-50x but I don't really keep much in the way of softies either. For your size tank you should be looking at around 4-5000 gph flow which if you can afford it the perfect solution would be dual mp 40s alternating.
The MP40w ecotech powerheads are very pricey but.. You get what you pay for! I have two of them facing eachother on a short pulse program and i never ever get deadspots and my corals and fish absolutely love the natural type water movement. Definitely one of the best investments i have made in the hobby. They create forward flow AND undertoe at the same time which moves the entire tanks water supply 24/7
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Old 02-08-2013, 05:26 PM   #7
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Ok so I'm @ 2600 gph now. So I'm def. gonna need 2 more. Where's the best place to place them.
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Old 02-08-2013, 05:29 PM   #8
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I like to put then on the back glass if possible to make them more hidden but that's not always an option due to rock scraping. The most efficient area tends to be on the side glass which I hate seeing but with my new scape I had to use them there unfortunately lol. You'll just have to play around with them until you find that sweet spot.
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Old 02-08-2013, 05:30 PM   #9
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Ok so I'm @ 2600 gph now. So I'm def. gonna need 2 more. Where's the best place to place them.
Generally at opposite ends of the tank facing each other. But it depends on your rock work.
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Old 02-08-2013, 05:31 PM   #10
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.. You'll just have to play around with them until you find that sweet spot.
+1^^^^^
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