300g Tank: What size drain would you choose?

Discussion in 'Reef Aquarium Discussion' started by revhtree, Jan 25, 2018.

?
  1. 1"

    21 vote(s)
    5.7%
  2. 1 1/2"

    171 vote(s)
    46.3%
  3. 2"

    166 vote(s)
    45.0%
  4. Other and please explain in the thread.

    11 vote(s)
    3.0%
  1. revhtree

    revhtree Owner Administrator Staff Member Team R2R R2R Supporter Photo of the Month Award R2R Excellence Award Build Thread Contributor Article Contributor Partner Member 2018

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    Asking for a friend... ;)

    If you were having a new 300g or larger aquarium built how big would you want the drain size of the overflow to be?

    1"
    1 1/2"
    2"

    Please let me know your thoughts!
     
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  2. crabs_mcjones

    crabs_mcjones Hooray, I'm useful! R2R Supporter Reef Squad R2R Excellence Award Build Thread Contributor

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    Any idea on how much turnover you (Or your friend;) ) are looking to achieve? 5x 10x?
     
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  3. Potatohead

    Potatohead Active Member

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    With a full siphon 2" would be plenty
     
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  4. revhtree

    revhtree Owner Administrator Staff Member Team R2R R2R Supporter Photo of the Month Award R2R Excellence Award Build Thread Contributor Article Contributor Partner Member 2018

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    No honestly it is for a friend! HA! As far as turnover goes what would you like? The question is what would you choose personally!
     
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  5. crabs_mcjones

    crabs_mcjones Hooray, I'm useful! R2R Supporter Reef Squad R2R Excellence Award Build Thread Contributor

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    Well if I had a 300 gallon tank would like to run the Triton method on it which requires 10 x turnover, plus I like alot of turnover. so id choose 2 inch :)
     
  6. saf1

    saf1 Active Member

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    I'm partial to 1 1/2" which is what I used for my overflow utilizing BeanAnimals design. I think there is a calculator around the interwebz that helps calculates based on length and height. I might have the equation wrong - I forget.
     
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  7. stylaster

    stylaster Reefer since '90 R2R Supporter R2R Excellence Award Reef Spotlight Award Build Thread Contributor

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    I did dual bean animals on my 312g tank and used 1.5" pipe so for a total of six 1.5" drains (primary, secondary, and emergency) this is coupled to a hammerhead pump doing 6,500 gph and i still have the dual primaries opened only 3/4 of the way. So dual 1.5" can handle i would say roughly around 8000 gph in your overflow if doing dual. If a single 1.5" then your good for atleast a 3,000 gph return pump if i did my math right :)
     
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  8. mfinn

    mfinn likes zoanthids R2R Supporter Build Thread Contributor Partner Member 2018

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    I don't like single drains on anything, so if it were me, dual 1-1/2" drains for the least I would recommend. Bean Animal style using 1-1/2" pipe is what I would prefer.
     
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  9. saf1

    saf1 Active Member

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    Yup - Bean's design is great. Allows a lot of flexibility, safety, and I have yet to have my primary fully opened like @stylaster noted.
     
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  10. foxt

    foxt Well-Known Member Partner Member 2018

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    Lots of other things to consider in the math, like what is the plumbing configuration to the sump, what kind of overflow method is desired, etc. When I designed my 220g, I went with 2” bulkheads on an external bean overflow. I wanted the flexibility that 2” gives me, can always choke it down but you can’t make it bigger after the hole is cut ....
     
  11. mtraylor

    mtraylor Valuable Member

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    I have 1.5" on my 255 with bean animal and its chocked back with a reeflo dart return pump. I use the dart on a manifold as well to run my reactors.
     
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  12. ca1ore

    ca1ore Valuable Member CTARS Member

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    1 1/2" is more than enough - I use a bean drain on my 450 with three 1 1/2" drains.
     
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  13. AlexStinson

    AlexStinson Plankton R2R Supporter

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    I am looking to do the same, I would go with 1.5 just for the ease of plumbing.
     
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  14. me & my baby

    me & my baby Active Member

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    When I had my 300 I had two 2” drains . That way pretty much what ever turn over I wanted I was covered .
     
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  15. GoVols

    GoVols VFL R2R Supporter MTRCMember R2R Excellence Award Build Thread Contributor Article Contributor Partner Member 2018

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    [​IMG]
     
  16. Want2BS8ed

    Want2BS8ed Active Member R2R Supporter

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    ^^^^this... particularly if you are shooting for a true 10x turnover. Sorta like the advice I was once given regarding a refinance - you can always double-up a payment on a 30-year mortgage, but you can't always extend a 15-year if something goes wrong.

    M
     
  17. DarkSky

    DarkSky Active Member

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    I have 1.5" drains on my 45 gallon, so extrapolating out you should probably do 10" drains on a 300 gallon.
     
  18. scott11106

    scott11106 Active Member R2R Supporter Build Thread Contributor

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    i am building a 300 and i went with 2 1.5" and for redundancy and creating a beananimal. in reality one of the 1.5" does most of the heavy lifting so if you were to have only one a 2" would be the pick
     
  19. Luno

    Luno Active Member

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    I have a 300g build happening ATM, Australia sizing is a little different but I'll be using bean animal overflow. 40mm drain (roughly 1.5"), 32mm Durso and emergency (roughly 1.25") and 25mm duel returns (roughly 1").
     
  20. MarineMalecki

    MarineMalecki Member Build Thread Contributor

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    I built my 300g with 1 1/2” drains in a bean animal setup. Even with my Hammerhead doing 6500gph, it’s rare that the 2nd drain is ever used
     
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