[Timezone Detection]
Create Account - Join in Seconds!

User Name: Email Address:
Human Verification

Please enter the six letters or digits that appear in the image opposite.

water movement


Bookmark and Share
Results 1 to 5 of 5
  1. #1
    carpenterwrasse - Reefkeeper CR Member
    Join Date
    May 2005
    Location
    Pittsburgh,Pa
    Posts
    901
    First Name
    George

    Default water movement

    here's the question for years i have not used any special formula to figure water movement in my tank but I want to learn...I want to employ a clm on my 75 gal tank 1 on the top and one in the bottom buried in the sand bed. I am not familar with head pressure and friction loss. my tank has 2 holes drilled in the back with bulkheads for exiting water they are 3/4, they lead into a t to form a single line into my sump.. I have a rio 2300 as a return pump...I have to adjust the valves to have a good in flow to a good return flow. question... If i make it 2 lines into the sump will i have more water leaveing to tank...i have valves in the lines coming into the sump as well as the return that i have to consistanly have to tweek. If i make it 2 lines into the sump will i have to have 2 valves to regulate the water coming in? and should i increse the size of the return pump.... I plan on a total tear down with a refit for all pvc or should i go with a pvc tube combo. people help me to finilize this rebuild

  2. #2
    hummer - Reefkeeper CR Member
    Join Date
    Nov 2006
    Location
    seneca ,IL
    Posts
    1,044

    Default

    why do you have to tweek the valves whats the tank doing?
    :: hummer :nemo

  3. #3
    Iconz - Reefkeeper CR Member
    Join Date
    Nov 2006
    Location
    Perry, GA
    Posts
    700

    Default

    well, i've done alot of reading on this subject lately bud, and here's what I've learned...

    I'm assuming you either have an overflow box or a built-in overflow.

    - Valves on an overflow line can cause some serious noise issues.

    - 3/4" pipe is going to give you a MAX of 500gph. This is due to friction and just size limitations.
    - So, yeah, 2 x 3/4 will give you a max of 1000gph.

    - Flex pipe will help you minimize friction/resistance. Especially if your drain pipes don't go STRAIGT DOWN into the sump. I say this because if they don't, you'll have to use some sort of angled connection 90 or 45 degrees... this would hurt your flow ALOT more than a flex pipe bent over a much longer distance.

    Return Pump
    The ideal thing is to have your return pump = to your overflow rate... your MAX is 1000gph. And pending your return head height... (We'll say 5' for calculations)

    For instance, a quiet one 5000 (rated at 1330gph at 0' head) would give you 800gph with 5' of head, 1 90degree elbow and 1 45 elbow.

    Head loss calc.


    CLM

    For the CLM, you won't have any head loss. It will at least be negligable (sp?)...

    - What you do want is 3-5x turnover / hour per outlet
    - You'll want to have 4-5 outlets per long side and 1 or 2 per short side... Keep in mind you can close some of these off if you need to, but its ALOT better to have more than to not have enough!
    - So, for a single outlet with 75 gal's at 4x turnover / hour.. that's 300gph X 10 outlets... 3000gph pump.... Something out of the sequence line should do you real well here. Probably a Dart.

    This is just some info for ya, if ya got any questions.. fire away! Just tryin to return some of the help i've gotten from you all!

    Keep me/us posted!

  4. #4
    carpenterwrasse - Reefkeeper CR Member
    Join Date
    May 2005
    Location
    Pittsburgh,Pa
    Posts
    901
    First Name
    George

    Default

    i tweek the valves to try and equalize the out to the in

  5. #5
    carpenterwrasse - Reefkeeper CR Member
    Join Date
    May 2005
    Location
    Pittsburgh,Pa
    Posts
    901
    First Name
    George

    Default

    iconz its something i will be looking into

Similar Topics

  1. Water Movement for Z&P's
    By jimsflies in forum Zoanthids & Palys
    Replies: 6
    Last Post: 07-16-2011, 07:48 AM
  2. Zoas & Palys Water Movement for Z&P's
    By jimsflies in forum Coral Discussion
    Replies: 7
    Last Post: 07-16-2011, 07:48 AM
  3. Flow & Plumbing Water movement in a reef
    By davejnz in forum Hardware
    Replies: 15
    Last Post: 05-13-2006, 06:45 PM
  4. Water movement
    By Reason in forum Basics
    Replies: 1
    Last Post: 03-19-2006, 09:56 PM
  5. Flow & Plumbing water movement
    By carpenterwrasse in forum Hardware
    Replies: 9
    Last Post: 06-04-2005, 03:10 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

About CaptiveReefs

    If you are interested in learning about reefkeeping or have a problem with your reef, our reefkeeping community is here to help. Feel free to ask a question or search our site. We have lots of experienced reefkeepers that are willing to provide free reefkeeping advice!

    Besides being a great resource for all levels of reef aquarium hobbyists, CaptiveReefs is a social experience that will enhance your enjoyment of reefkeeping. CaptiveReefs is committed to connecting reefkeepers with the support and information they need to grow beautiful coral reef aquariums.

Information

Connect with Us