Dosing pump ideas?

Discussion in 'Equipment' started by rygh, May 9, 2013.

  1. rygh

    rygh Supporting Member

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    So what dosing pump should I buy?

    I had yet another BRS doser fail on me. Grr.

    Time to buy something rather high quality.
    Opinions??
    Main choices so far:

    1) SpectraPure LiterMeter III
    250 ml/m , 3 rollers
    5 year warranty

    2) Vertex Libra
    Interesting new product, but no long term history, and some concerns on support.
    75 ml/m, 4 roller design, good Japanese motor.

    3) GHL Proflux / Fauna Marin
    60ml/m, 3 rollers.

    I am generally avoiding the Bubble Magus doser.
    A few reports of failing "ON". Seems rare, but is catastrophic if it happens.
    Plus in general seems a bit lower quality.

    I am generally avoiding Cole Palmer / medical, as simply way too expensive.
    While used on ebay brings that price down, that is too hit/miss for me.

    Drew's dosers are just too low flow.

    And of course, no more BRS for me.
     
  2. sfsuphysics

    sfsuphysics Supporting Member

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    Do you know what the failure issue was? The tubing? Or did the motor seize up? I mean I've had tubing issues, and it's just a matter of replacing that periodically.
     
  3. rygh

    rygh Supporting Member

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    The first failure was the motor. Not seized, no obvious shorts or breaks. I took it apart, but nothing obvious.
    The new failure seems to have been a temporary jamb. I think I fixed it for now. Basically just took it apart and fiddled with it.
    No idea what I did right.
    Nice though, because it gives me time to think about what to get.
    Yes, tubing replacement every year is pretty normal.
     
  4. iani

    iani Guest

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    How about this?
    http://www.aptinstruments.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=AI&Product_Code=SP100VOBL
     
  5. iani

    iani Guest

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    or this
    http://www.aptinstruments.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=AI&Product_Code=SP200VOBL
    depending on what flow rate you want.
     
  6. gimmito

    gimmito Guest

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    GHL PROFILUX.
     
  7. rygh

    rygh Supporting Member

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    Interesting.
    Sounds like those are the same as the Drew's doser pumps, just purchased direct, and more selection on flow.
     
  8. rygh

    rygh Supporting Member

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    So does anyone know the details on the Proflux/Fauna Marin transition?
    It seems like they are re-branding it, but that if you mix parts it voids the warranty.
    As a result, seems like both are hard to find.
    Only aquacave sells Proflux + spare parts.
    Only BRS sells Fauna Marin, and no spare parts.
    Makes me a bit nervous buying it.

    Side note:
    I see a couple of reports of the new Verted Libra doser pump getting stuck ON.
    Given how few people have them, even a couple of reports is way too many.
    My wild guess suspicion : Fancy pumps and motors, so to keep the price down, cheap relays and electronics.
     
  9. rygh

    rygh Supporting Member

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    A new temptation is this one:
    http://stenner.com/prod-45mp4.htm

    Seems better than the APT instruments one. Larger three roller head.
    For industrial use, not medical/lab, so tough, yet not as expensive as cole-parmer.
    About $200 each.
    US company, lots of replacement parts available.
     
  10. iani

    iani Guest

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    Except the ones I linked have brushless motors and should last a whole lot longer than the cheaper versions.
     
  11. BAYMAC

    BAYMAC Guest

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    Steer clear of APT unless you don't mind waiting a long time. They stock nothing, its all made to order I've found out the hard way. The build quality is pretty crappy.

    My CP was $100 and other then a $3 fuse and 5' of tubing, it hasn't cost me anything more and is a real workhorse.

    Of your list, there is only 1 that I'd use... GHL
     
  12. flyingphish

    flyingphish Guest

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    I have been using a litermeter3 for the last 6 years 24/7. Three pumps dosing Alk, Ca, and fresh water top off thru a deltec kalk stirrer.

    i leave on one and two week vacations and always come home to a tank with spot on parameters.

    Never had a pump fail either...
     
  13. Coral reefer

    Coral reefer President

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    are the cole palmers loud?
     
  14. BAYMAC

    BAYMAC Guest

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    A well used CP may have some squeaking, but mine is as quiet as a peristaltic can be.
     
  15. Coral reefer

    Coral reefer President

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    Thanks. I saw a "medical grade" peristaltic medical pump somebody was using on a setup that was loud for some reason. Never seen a cole Palmer before I guess. Didn't know what they were using exactly.
     
  16. rygh

    rygh Supporting Member

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    Supposedly the LiterMeter3 pumps are the quietest.
    That was from reviews on the net. I have never compared them myself.
    It has a different kind of direct drive to the rollers, not a normal gear motor, which is probably why.

    I wish they had not put the controls on the top of the Profilux.
    Makes mounting in tight spaces rather hard.
     
  17. Vincerama2

    Vincerama2 Evil Overlord

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    I can tell you that my Spectrapure "Ultimate Top Off" (or whatever) is awesome. Awesomely expensive too, but since I bought it, I never worry about top off or water level. Totally worth it.

    I'm assuming that since the motor is the same, then the Spectrapure LM must be equally great.

    I used to use a medical enteric feeding pump. It was OK, but it was a pain tracking down tubing for it, since it's not meant to be run 24/7 (I ran it for like 5 years, 24/7) And when the water gets low, the alarms go off.

    I don't know about the other pumps, but if I were to do the dosing pump thing (for two part, right?) I'd get the spectrapure again just as a known good quality (for me).

    V
     
  18. CookieJar

    CookieJar Guest

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    I've had litermeter III for about 4-5 years and have no complaints with it, it's been a workhorse for me. I use it for top off, calcium & alk. The only problem is the alk dries up/ precipitates & clogs up the line so I have to clear it out regularly. If I were starting anew I'd probably go with the GHL- I like how they're all together, the interface is better & you can have up to 4 pumps, litermeter tops out at 3.
     
  19. rygh

    rygh Supporting Member

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    Thanks for all the great advice!

    I ended up buying a Liter Meter 3.
    BRS had a memorial day sale.

    I was leaning toward GHL, but only 1 store in the US seems to sell them, and they
    were out of stock. Scared me off.
     
  20. BAYMAC

    BAYMAC Guest

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    If your peristaltic lline is drying out, your pump head is broken. It should never allow liquid out unless pumped. If it does, there is a leak someplace.
     

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