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Flow question

Discussion in 'General Discussion' started by IowaJeeping, Nov 17, 2013.

  1. Nov 17, 2013 #1
    IowaJeeping

    IowaJeeping

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    OK so I have a flow question. I have 2 mp40's and I know most all people put them on the sides of their tanks. What do you guys think about putting them on the back of the tank? What would pros and cons be?
     
    Last edited by a moderator: Oct 24, 2015
  2. Nov 17, 2013 #2
    JB Marion

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    That's what I'm going to do in my tank. I doubt it matters unless you're trying to make a left to right wave.
     
  3. Nov 17, 2013 #3
    IowaJeeping

    IowaJeeping

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    That's what I was thinking also I should add I have a 180 and do have hydor pumps in there also. I wanna make the front and sides clean looking
     
    Last edited by a moderator: Oct 24, 2015
  4. Nov 17, 2013 #4
    blackx-runner Cedar Rapids, IA

    blackx-runner Administrator Website Team Leadership Team

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    There is nothing wrong flow wise with putting them on the back of the tank. The issue you could run into with the MP40s is they pump out so much water it could get wild when it hits the front of the tank in that short distance. If you have sand in your tank don't expect it to stay around the front glass on even some lower levels of flow. Barebottom tanks would be fine.
    I tried running 2 MP40s halfway up on the back wall of my 250 deep dimension tank. Even with the 3 ft width I couldn't keep the pumps from blowing out the sand unless I turned them way down. I bit the bullet and moved them around the sides so I could crank them up.
     
  5. Nov 17, 2013 #5
    IowaJeeping

    IowaJeeping

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    Thanks blackx runner I think I'm just going to try it just for craps and giggles but I bet I run into the same problem
     
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  6. Nov 17, 2013 #6
    JB Marion

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    So you're saying that 2 MP 40's are going to be a lot of flow for my 90G... /DesktopModules/ActiveForums/themes/_default//emoticons/biggrin.gif
     
  7. Nov 17, 2013 #7
    ruggerkc North Liberty , IA

    ruggerkc Experienced Reefkeeper Board of Directors Leadership Team GIRS Member

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    I have 2 in my 120 (4'x2') and I so wanted them on the back but it doesn't work near as well as on the sides. Maybe if your rock work is different than mine you would have better luck. I had dead spots in the middle.
     
  8. Nov 17, 2013 #8
    blackx-runner Cedar Rapids, IA

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    I would say flow wise 2 MP40s is a great choice for a 90. Now getting them in the right position and being able to crank up the flow without blowing away your sandbed is another issue.



     
  9. Nov 24, 2013 #9
    JB Marion

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    I put the MP40's on the back of the tank today and they don't seem to cause any problems.
     
  10. Nov 25, 2013 #10
    IowaJeeping

    IowaJeeping

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    I have them on my back of the tank now for 2 or 3 days no issue. Now I don't have them cranked up. I been playing around with a added tunze on the side also with it on and off. Really like what I see from the tunze
     
    Last edited by a moderator: Oct 24, 2015

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