dHK math

Discussion in 'Water Chemistry' started by troythegreat, Oct 31, 2009.

to remove this notice and enjoy 3reef content with less ads. 3reef membership is free.

  1. troythegreat

    troythegreat Astrea Snail

    Joined:
    Feb 1, 2009
    Messages:
    72
    how much will a 5gal of water change at 14dHK affect a 75gal system at 8dHK?...

    any ideas anyone? dont want to shock my system
     
    troythegreat, Oct 31, 2009
    troythegreat, Oct 31, 2009
    #1

    2. Click Here!

  2. pgreef

    pgreef Fire Goby

    Joined:
    Dec 6, 2008
    Messages:
    1,344
    Location:
    Algonquin, IL
    Would change it to (5g*14dKh +70g*8dKh)/75g = 8.4dKh
     
    pgreef, Oct 31, 2009
    pgreef, Oct 31, 2009
    #2
  3. troythegreat

    troythegreat Astrea Snail

    Joined:
    Feb 1, 2009
    Messages:
    72
    wow..nice formula..thanks
     
    troythegreat, Oct 31, 2009
    troythegreat, Oct 31, 2009
    #3
  4. reeferdude

    reeferdude Fire Shrimp

    Joined:
    Jun 12, 2008
    Messages:
    302
    Location:
    kannapolis,n.c.
    why worry with all the math stuff? go to bulkreefsupply.com at the top of page there is a link to calcium and alkalinity calculator. use it to get your 75 gallons to where you want (no more than 1 or 2 dkh a day) then when you do a wc, make it with the same alk readings. i like to run about 11 dkh, i have to add alk to my top off water every other day. if my ph is 8.3 to 8.4 i add baking soda, if my ph is 8.2 to 8.3 i add soda ash ( that i bought from brs)
     
    reeferdude, Oct 31, 2009
    reeferdude, Oct 31, 2009
    #4
  5. sailorguy

    sailorguy Torch Coral

    Joined:
    Mar 15, 2009
    Messages:
    1,186
    Location:
    new jersey
    Im impressed!!! I would have said...not much.
     
    sailorguy, Oct 31, 2009
    sailorguy, Oct 31, 2009
    #5