Alkalinity : What dKH do you target and why?

Discussion in 'Water Chemistry' started by NASAGeek, Jan 30, 2010.

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What dKH do you target?

  1. <=7

    3.0%
  2. 8

    9.1%
  3. 9

    21.2%
  4. 10

    30.3%
  5. 11

    9.1%
  6. 12

    21.2%
  7. >12

    12.1%
Multiple votes are allowed.
  1. NASAGeek

    NASAGeek Eyelash Blennie

    Joined:
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    I am making a series of blog entries to help me understand water chemistry and organize my information. First, I investigated Specific Gravity and captured my results here http://www.3reef.com/forums/blogs/mmcdonald/specific-gravity-notes-307.html

    Now, I am delving into Alkalinity.

    My questions for this poll are as follows:

    What dKH do you target?
    How do you measure dKH?? (which kit or other means?)
    What method do you use to maintain dKH?

    Feed back and links to related articles appreciated. As before, I'll organize it all into a single integrated blog entry to capture for everyone as a reference.

    Thanks,
    Mark
     
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  3. the fisherman

    the fisherman Vlamingii Tang

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    Location:
    new jersey
    I keep my alk at 11 dkh

    I use API test kit

    To maintain my alk I use a geo calcium reactor
     
  4. tatted4ever

    tatted4ever Clown Trigger

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    What dKH do you target? 10.0
    How do you measure dKH?? Salifert
    What method do you use to maintain dKH? BRS two part
     
  5. NASAGeek

    NASAGeek Eyelash Blennie

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    I should have posted my own answers... exact same as tatted4ever

    What dKH do you target? 10.0
    How do you measure dKH?? Salifert
    What method do you use to maintain dKH? BRS two part
     
  6. surferdude

    surferdude Banned

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    Revert to My Thread where I ask for ALL Parameters. No chemest online yet obviously. LOL;D
     
  7. Screwtape

    Screwtape Tonozukai Fairy Wrasse

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    8-9dkh here. My tank is using about 1dkh a day right now so by the end of the day it's down to about 8 and then i boost it to 9 dosing with BRS 2 part.

    My new tank will use a ca reactor and I'll have to play with it a little. I'd like to target 9dkh but I might drop that down a little bit if I run into problems. Some ultra-low nutrient systems (using vodka or carbon dosing) do better with slightly lower alk.

    I use Elos test kits right now, quickest and easiest kit I've found. I may get a Salifert kit as well since you get more tests for your money and I test alk more than I test calcium because it's easier for the alk to get out of the ideal range than cal. For example if you lose 2dkh from your target of 8dkh that means you will have lost less than 20ppm of calcium generally (you lose generally about 2.8dkh alk to every 20ppm of calcium). My target calcium is over 400 so 20ppm doesn't put that into the danger zone. The alk gets into the danger zone much more quickly than my calcium so it's better to watch your alk, so you can save some money/time on calcium testing.
     
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  9. NASAGeek

    NASAGeek Eyelash Blennie

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  10. wfb2270

    wfb2270 Corkscrew Tentacle Anemone

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    Location:
    VA
    12dkh
    api test

    dont really try to "target" just seems to be what it stays at. i do water changes to maintain. 25% or so a month. i do add some kent marine alk buffer to top off water sometimes
     
  11. missionsix

    missionsix Super Moderator Staff Member

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    I like to target 10-11. What works for me may not work for you. I like to hit 10-11 and check/adjust 3-4 weeks later. It will drop to around 7-8 in that time.
     
  12. ReefSparky

    ReefSparky Super Moderator Staff Member

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    Location:
    South Florida
    What dKH do you target? 11
    How do you measure dKH?? (which kit or other means?) Salifert
    What method do you use to maintain dKH? BRS Two Part