Bad day: Apex and dosing pumps

Discussion in 'Equipment' started by DurTBear, Dec 16, 2009.

  1. screebo

    screebo Guest

    Are most folks spreading out their twopart dosing to 4 or more times a day?
     
  2. Gomer

    Gomer Honorary Member

    I dose 5x a day spread through the day. If I was to weight a portion of the day, I would do it at lights on vs lights off.
     
  3. DurTBear

    DurTBear Guest

    Yeah, it's only a total of 72 ml per day. Any reason to do it while the lights are on vs when the lights are off? I thought you should dose Alk at night when your pH is lowest?
     
  4. Gomer

    Gomer Honorary Member

    I would think it would be good to maintain alk/Ca by replacing the depletion during time of max consumption.
     
  5. screebo

    screebo Guest

    Edited to correct my approach to outlet programing and do as Tony suggests, use "Advanced" mode and enter start and stop codes.
    Thanks for the suggestion, Tony!
     
  6. screebo

    screebo Guest

    Edited to correct my thinking! :exmark: I now am programing the pump outlets in Advanced mode and entering start and stop times 5 times a day for 11 minutes each giving me a total run time of 55 minutes for my 107 gal system.

    Also, I'm running my Mh on #4 and #8 position. They handle more current than the other sites. I'm using #2 and #6 for my dosing pumps. Make sure and change the name of each circuit on the block to reflect what you are running.

    [​IMG]
     
  7. screebo

    screebo Guest

    I follow ya H)
    So I updated dosing outlet types to "Advanced" and entered the following code for CA dosing:

    Fallback OFF
    Set OFF
    If Time 12:00 to 12:11 Then ON
    If Time 14:00 to 14:11 Then ON
    If Time 16:00 to 16:11 Then ON
    If Time 18:00 to 18:11 Then ON
    If Time 20:00 to 20:11 Then ON

    This coded for the outlet with the ALK doser:

    Fallback OFF
    Set OFF
    If Time 13:00 to 13:11 Then ON
    If Time 15:00 to 15:11 Then ON
    If Time 17:00 to 17:11 Then ON
    If Time 19:00 to 19:11 Then ON
    If Time 21:00 to 21:11 Then ON

    I think this makes sense based on what we've been discussing. :cool:

    Thanks again for all the gentle direction............ :crown:
     
  8. GreshamH

    GreshamH Guest

    You positive that is when they lay down the most skeleton? I seem to recall it as the opposite.
     
  9. Gomer

    Gomer Honorary Member

    It looks like we both recall something different so I guess some homework is in order :)
     
  10. GreshamH

    GreshamH Guest

    psssh I'm still at work so you're it :lol: 1:20 and counting!!!!
     
  11. Gomer

    Gomer Honorary Member

    Diurnal Changes in Microstructure and Microscale Chemistry of Reef Coral Skeletons
    A.L. Cohen, et al, Dept of Geology and Geophysics, Woods hole of Oceanographic Institution

    Abstract:
    Calcification by corals with symbiotic zooxanthellae occurs 3 times faster in daylight than it does at night. We investigated the effects of light enhanced calcification on the microstructure and elemental chemistry of the aragonite skeleton over the diurnal cycle. The morphology of nighttime crystals accreted in the absence of photosynthesis imitates that of slow growing inorganic cements in a high CO2 environment. The morphology of daytime crystals accreted during the photosynthetic period imitates that of fast growing inorganic cements in a low CO2 environment. We used an Cameca IMS 3f ion microprobe to measure changes in the strontium-calcium content (Sr/Ca) of the growing skeleton of the tropical reef coral, Porites lutea, over the diurnal cycle. Sr/Ca in nighttime skeleton is close to equilibrium values but a large decrease in Sr/Ca is observed as the daytime crystals grow to fill the extracellular calcifying space in summer. The amplitude of change in skeletal Sr/Ca between night and day is as large as the annual cycle in Sr/Ca. During summer, at peak water temperature and symbiont photosynthesis, the amplitude of the diurnal Sr/Ca cycle is 3 times greater than that incurred only by the diurnal change in water temperature. During winter, the amplitude of the diurnal Sr/Ca cycle is equivalent to that incurred by temperature alone. Our data show that processes linked to symbiont photosynthesis exert significant influence on both skeletal microstructure
    and microchemistry, and that temperature is not the primary control of diurnal Sr/Ca variability in reef coral skeleton.





    P. Spencer Davies1, 2
    (1) Department of Zoology, University of Glasgow, G12 8QQ Glasgow, Scotland, UK
    (2) Discovery Bay Marine Laboratory, Jamaica

    Accepted: 16 January 1989
    Communicated by J. Mauchline, Oban
    Abstract An accurate method for determining the growth rates of the skeleton of isolated branch tips (nubbins) of corals over intervals of less than 24 h is described. The skeletal weight of the coral was estimated from its buoyant weight in seawater whose density had been accurately determined. The coral tissues accounted for between 1 and 5% of the total buoyant weight in Pocillopora verrucosa and Acropora humilis with differing relative tissue biomass. After correcting for tissue buoyant weight, predictions of skeletal weight were accurate to within 1%. The method was used to estimate the growth of sample nubbins of Porites porites of similar diameter, in 2 m of water at Discovery Bay, Jamaica. Since growth of these branch tips is apical, growth rate could be expressed without correction for the size. The mean 24 h skeletal growth rate ranged between 40 and 47 mg. Differences could be measured between day-time and night-time growth, the day: night ratio being 3.7
    . The method also showed that P. porites virtually ceases calcification during the 4 to 5 d periods that it becomes enclosed in a mucus tunic. Nubbins of P. porites attached to the reef at different locations showed clear differences in growth rate with depth, and between clear and turbid water sites. The growth rate of nubbins was compared with that of branch tips of whole corals by measuring the linear extension after staining with Alizarin Red S. After 3 1/2 mo, the mean linear extension was 4.1 mm in each case, indicating that the growth rate of nubbins is the same as that of branch tips of the whole colony. It is suggested that this buoyant weighing technique will find applications in laboratory experiments with calcification mechanisms and as a bioassay on reefs exposed to environmental stress.
     
  12. GreshamH

    GreshamH Guest

    What no link??? didn't happen, nope, not going to trust it :lol:

    Woods Hole, oh right, I'm gonna believe some rinky dink operation like that :p
     
  13. GreshamH

    GreshamH Guest

  14. Gomer

    Gomer Honorary Member

    :p

    http://www.whoi.edu/science/GG/people/acohen/research/chemistry.html

    http://www.springerlink.com/content/m88950t373k54m8p/


    find me some truffles!
     
  15. GreshamH

    GreshamH Guest

    Unless you are present when I find them, and have tied my throat off, that'll be a big problem :lol:
     
  16. Gomer

    Gomer Honorary Member

    lol. If you ever go to the Ferry Terminal, hit up the creamery (only big cheese shop there) and get their Sottocenere. H.S., that stuff is good!!!!! (it's a truffle oil/truffle infused cheese)
     
  17. GreshamH

    GreshamH Guest

  18. screebo

    screebo Guest

    Using this logic, should I consider dosing CA during the day and ALK during the night as the Ph drops after the lights turn off? Thanks for continuing to beat this horse. I want to maximize my results!
     

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