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Page 2 of 2 FirstFirst 12
Results 11 to 16 of 16
  1. #11

    Join Date
    May 2010
    Location
    Glen Arm. MD
    Posts
    2,635

    Awards Showcase

    Happy Christmas - MuckyFish thanks for advising on vegetables for my kribs! so here is a discus - ScottishFish You help a lot - PhillipOrigami For the bank account, and thx for the rep - Cliff beautiful discus! - Crispy 
    I know this doesn't help but it's all I can do! - chrisfraser05 for all the wise advice you've given me - fishmommie Congrats on 2000th post! - andreahp Merry Christmas! - fishmommie Merry Christmas - Cliff 
    Thanks for the rep :-) - ~firefly~ appreciate it. - fishmommie Thanks for the birthday wishes - mommy1 ٩(̾●̮̮̃̾̃̾)۶ - korith For all the good advice you give. - ~firefly~ 
    Thanks for the rep the other day - Cliff thanks for the rep points.  appreciate it - fishmommie happy friday! - mojosodope Merry Christmas! - ~firefly~ Thanks for the rep! - steeler1 

    Smile


    0 Not allowed!
    The substrate can store toxic chemicals like a sponge - a single 90% water change will do far more than three 50% water changes (first: 10 ppm * 0.5 = 5 ppm; next one: 5 ppm * 0.5 = 2.5 ppm; third one: 2.5 ppm * 0.5 = 1.25 ppm. Now a single 90% is: (10 ppm - 10* 0.9) = 1 ppm. So a 90% W/C gives 1 ppm but THREE 50% W/C give 1.25 ppm!!!!

    Note the math. It is tricky for values that aren't 0.5. For example: a 75% W/C is NOT 10 ppm * 0.75 = 7.5 ppm!!! Not correct. It is really 10 ppm - (10 *0.75) = 2.5 ppm left. The 0.5 is a special case that works by simple multi. In a similar fashion, a 25% W/C is 10 ppm - (10 *0.25) = 7.5 ppm left in the tank. Try this method for 0.5 and it still works.

  2. #12

    Default


    0 Not allowed!
    Massive +1 to the previous two posts.
    Gas mileage isn't everything OIIIIIIIO
    Lack of planning on your part does not constitute an emergency on my part.
    Why pretend there are no stupid questions? Actually, There are many stupid questions: "Should I drink this bleach?" Is just one example.
    Having said that, Just because it's a stupid question doesn't mean that it shouldn't be asked. It's better to know.

    A warm beer is better than a cold beer. Because nothing is better than a cold beer, and a warm beer is better than nothing.

  3. Default


    0 Not allowed!
    what everyone else said

  4. Default


    0 Not allowed!
    Quote Originally Posted by Cermet
    The substrate can store toxic chemicals like a sponge - a single 90% water change will do far more than three 50% water changes (first: 10 ppm * 0.5 = 5 ppm; next one: 5 ppm * 0.5 = 2.5 ppm; third one: 2.5 ppm * 0.5 = 1.25 ppm. Now a single 90% is: (10 ppm - 10* 0.9) = 1 ppm. So a 90% W/C gives 1 ppm but THREE 50% W/C give 1.25 ppm!!!!

    Note the math. It is tricky for values that aren't 0.5. For example: a 75% W/C is NOT 10 ppm * 0.75 = 7.5 ppm!!! Not correct. It is really 10 ppm - (10 *0.75) = 2.5 ppm left. The 0.5 is a special case that works by simple multi. In a similar fashion, a 25% W/C is 10 ppm - (10 *0.25) = 7.5 ppm left in the tank. Try this method for 0.5 and it still works.
    Oh believe me, if my readings are that bad i automatically vaccum my gravel. the other problem is a full 2.5 bucket in my case is all i can safely carry without chance of dropping it. So i had to do two to three water changes in the same day one after the other to ensure i covered everything.
    6 gal column- 1 powder blue dwarf gourami, 1 bronze cory, and one nerite snail, planted.
    10 gal - 2 F celebus rainbows, 3 ghost shrimp, 1 nerite snail, 1 mystery snail, planted
    10 gal #2 - 6 flame tetras, 1 ornate tetra, 1 nerite snail, and 1 emperor tetra planted
    Cinnamon = 9 year old Siamese Cat

  5. Default


    0 Not allowed!
    I vacuumed all my gravel during the first and second 50% changes.

    Aha! There lies the problem Cermit! three 50% changes didn't change the reading at all. That was three 50% WCs within three days.
    Last edited by Dave Waits; 11-17-2012 at 03:09 AM.

  6. Default


    0 Not allowed!
    Quote Originally Posted by korith
    As an experiment, take a store bought water bottle and test the water in it. If it gives a weird result there is a good chance your test kit may be messed up or expired.

    Here is how to check the bottle to see if it is expired.

    Each reagent bottle has a Lot # printed
    on the bottle. The last four digits are the month and year of
    manufacture. Example: Lot # 28A0102. This is a pH reagent manufactured
    in January of 2002. Pond Care Wide Range pH, ammonia, High Range pH,
    Nitrate, phosphate, Copper, calcium and GH all last for three years.
    nitrite and KH will last for four years. Freshwater pH(low range) and
    Pond Care Salt Level will last for five years. I would not trust these
    kits after they have expired.

    Info was found on
    http://www.fishlore.com/fishforum/te...kit-users.html
    Lot number on my Nitrite bottle says;Lot 26AO712 EXP.07/2017 so, it was made in July of this year.

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