Tunze 9004 DC vs non-DC

Discussion in 'Tunze' started by czhao1009, Mar 10, 2017.

  1. czhao1009

    czhao1009 Member

    Joined:
    Nov 5, 2016
    Messages:
    40
    Likes Received:
    29
    Hi All, I'm thinking about replacing my HOB skimmer with a Tunze 9004. Based on the reviews, I like the facts that it's internal and quiet :)
    Besides being able to control the pump, what other advantages are there for the DC version?
    I'm not sure which one to get.

    My tank is 45 gallon with no sump.
    Thanks in advance!
     
    Tags:

  2. Orcus Varuna

    Orcus Varuna Active Member

    Joined:
    Mar 20, 2016
    Messages:
    438
    Likes Received:
    321
    The bonus is being able to control, which is awesome IMO. I have the 9001 DC and wouldn't trade it out for anything. Having the ability to adjust skimmate consistency on the fly is worth the extra 50$.
     
  3. czhao1009

    czhao1009 Member

    Joined:
    Nov 5, 2016
    Messages:
    40
    Likes Received:
    29
    Thank you. I have never had a DC pump before, are they more or less reliable than the AC version in the long run?

    Looks like I will be ordering a 9004 DC very soon :)
     
  4. Orcus Varuna

    Orcus Varuna Active Member

    Joined:
    Mar 20, 2016
    Messages:
    438
    Likes Received:
    321
    Reliability is fine at this point and usually I prefer good old ac pumps that I know for a fact will run for the next 7-10 yrs. But when dealing with these compact water level dependent skimmer having the additional adjustability the controllable dc pump provides is invaluable in getting the best possible skim consistency IMO :)
     
  5. rvitko

    rvitko Well-Known Member R2R Supporter Gold Sponsor Toys For Kids Sponsor

    Joined:
    Aug 20, 2012
    Messages:
    500
    Likes Received:
    201
    Location:
    Austin, TX
    The DC pump, you get a much more precise control and easy adjustment, it is also stronger so the skimmer is rated slightly higher. DC has the advantage that by slowing or speeding up the pump your water and airflow ratio stays relatively constant, with AC and an air adjustment as you decrease air flow you increase water flow. It is true in general that DC pumps don't last as long, our engineering target is a 5 year life for a DC pump and a 10 year life for an AC pump. With good care an AC pump can last nearly indefinitely with just impeller replacements as they wear, they lack any electronics. In DC pumps, the electronics wear out, you also have a controller and power supply that can be water damaged. DC pumps can be made to last but it requires heavy duty components (capacitors are the main weak point, the thin film type have a 7-8 year life span) that are very expensive and difficult to miniaturize (a tantalum ceramic capacitor can last 40+ years but they cost substantially more and are much larger and that is just one component, the others won't tend to last as long unless a comparable increase in quality and cost is made for every component). The Stream 3 is built to be a forever DC pump but this is reflected in the price and bulk. Bottom line, I would expect the DC pump to last at least 5 years, the pump can be replaced for about a 1/3rd of what the whole skimmer costs and in 5 years, there is likely to be something better or you have a different tank. FWIW, on my last tank build I went with the 9012DC and I am liking it so far even though I have just water, rock and sand to look at.
     
  6. czhao1009

    czhao1009 Member

    Joined:
    Nov 5, 2016
    Messages:
    40
    Likes Received:
    29
    Thanks again for the information :) I think the decision has been made!
     
  7. Reef man 89

    Reef man 89 Valuable Member

    Joined:
    Oct 8, 2016
    Messages:
    1,291
    Likes Received:
    767
    I have the Tunze 9004 dc and love it wouldn't trade it for any other skimmer. It's super quite and love the surfece skimming not more nasty oily film on top of the water. Great product highly recommend it.
     
    saltyfilmfolks likes this.
  8. czhao1009

    czhao1009 Member

    Joined:
    Nov 5, 2016
    Messages:
    40
    Likes Received:
    29
    Just got the skimmer :) :)

    Should I let it run on 100% air for a few days to let it break in? Any other tips would be greatly appreciated, especially how to properly tune it?
    Thanks again.
     
    saltyfilmfolks likes this.
  9. DiamondD

    DiamondD New Member

    Joined:
    Mar 14, 2017
    Messages:
    3
    Likes Received:
    2
    Congratulations. That's a great skimmer. I love mine.
     
    saltyfilmfolks likes this.
  10. rvitko

    rvitko Well-Known Member R2R Supporter Gold Sponsor Toys For Kids Sponsor

    Joined:
    Aug 20, 2012
    Messages:
    500
    Likes Received:
    201
    Location:
    Austin, TX
    I would make sure the depth is right, only 1/4-1/2 of the intake under the cup submerged and start with the pump set at 20% and expect that at most the pump will be set to about 70%.
     
    saltyfilmfolks likes this.
  11. czhao1009

    czhao1009 Member

    Joined:
    Nov 5, 2016
    Messages:
    40
    Likes Received:
    29
    Currently about 1/3 of the intake is submerged and the air is at around 30% or so. When I first turned it on at 100% it just immediately overflowed :)

    After running all night, i just checked it during lunch, no microbubbles escaping out and is super quiet! Very happy so far. :)
     
    saltyfilmfolks likes this.
  12. rvitko

    rvitko Well-Known Member R2R Supporter Gold Sponsor Toys For Kids Sponsor

    Joined:
    Aug 20, 2012
    Messages:
    500
    Likes Received:
    201
    Location:
    Austin, TX
    Sounds perfect, over time you will be able to increase the pump, usually around 50% is where you will end up after it kind of catches up with the organics already present, and it is a slow increase maybe 10% every 6 weeks or so.
     
    saltyfilmfolks likes this.
  13. Reef man 89

    Reef man 89 Valuable Member

    Joined:
    Oct 8, 2016
    Messages:
    1,291
    Likes Received:
    767
    I have the Tunze DC in my Nuvo 40 and love it work great and pulls awesome skim.
     
    Baugher3715 and jmanyoma like this.
  14. OrokuSaki84

    OrokuSaki84 Member

    Joined:
    Jun 6, 2017
    Messages:
    39
    Likes Received:
    6
    Location:
    New Jersey
    What chamber are you running the skimmer in? I'm looking to replace my ghost skimmer with one of these. Will it fit in the chamber to the right of the return pump chamber? (if looking at the tank from the front)
     
  15. Reef man 89

    Reef man 89 Valuable Member

    Joined:
    Oct 8, 2016
    Messages:
    1,291
    Likes Received:
    767
    No it will only fit in the first chamber so you will have to only run one filter sock. If you choose to use this skimmer. IMO it's worth it
     
  16. OrokuSaki84

    OrokuSaki84 Member

    Joined:
    Jun 6, 2017
    Messages:
    39
    Likes Received:
    6
    Location:
    New Jersey
    Do you find it gets clogged or fouls anything later down the line before the return pump? Fish foods/snails etc?

    Definitely seems like a better location of it in that first chamber so it can actually skim tank surface water. Thanks for the heads up!
     
  17. Reef man 89

    Reef man 89 Valuable Member

    Joined:
    Oct 8, 2016
    Messages:
    1,291
    Likes Received:
    767
    No I have not had any problems with it and mine has been running now for about 6 months. I feed pellets to my fish and have watch some fall into the skimmer and nothing got clogged.
     
    OrokuSaki84 likes this.
  18. bk_market

    bk_market Member

    Joined:
    Jan 31, 2015
    Messages:
    88
    Likes Received:
    28
    I just recently purchase a regular 9004 skimmer for my IM 30L. It is skimming good, run very quite and I have no complain. I'm new to this so I don't know what else extra the DC version will do for me since it cost almost double.
     
  19. Reef man 89

    Reef man 89 Valuable Member

    Joined:
    Oct 8, 2016
    Messages:
    1,291
    Likes Received:
    767
    I have the DC model and pretty much you have a controler to adjust the pump speed. Also DC motor use less electricity then you AC motor.
     
  20. Jare86cmp

    Jare86cmp Member

    Joined:
    Oct 28, 2017
    Messages:
    10
    Likes Received:
    1
    Location:
    Miami,FL
    Blah
     
Draft saved Draft deleted

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice
Loading...