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  1. #1

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    Default do you add salt every time you do a water change ?


    0 Not allowed!
    when ever a water change is made will it lower the salinity level in a tank ?

  2. #2

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    0 Not allowed!
    Right, the water used for a water change needs to be premixed and match the tank's salinity, pH, temp, etc. otherwise the salinity will drop. But topping off evaporation needs to be pure freshwater.
    Aquarist since 1995
    Biologist and Published Author in Multiple Aquarium Magazines
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  3. #3

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    0 Not allowed!
    When you take water out of the tank, you take the salt out with the water. The water that is replaced during a water change needs the salinity to match that of the tank.

    Water added to the tank due to evaporation needs to be freshwater.

    - 29g FW - Community - Congo Tetras and a mated pair Kribensis
    - 55g SW - Royal Gramma, 6-Line Wrasse, 2 Ocellaris Clownfish, and various corals and inverts

  4. #4

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    0 Not allowed!
    Quote Originally Posted by melbfish20
    when ever a water change is made will it lower the salinity level in a tank ?
    No, since every square inch of water in the tank has the same salinity, if i took 100 gallons out of my 125 gallon reef, i would still have a 1.025 salinity

    however, when you put in the new water, it has to be the same salinity as the tanks water

  5. #5

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    0 Not allowed!
    how much water changes do most people do ? their seems to be a very large range from what I have read on the net.

    is their anyway to reduce the required water changes ?

  6. #6

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    usually 20%-30% a week, and theres no way around water changes, they replenish needed minerals

  7. #7

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    0 Not allowed!
    Quote Originally Posted by cocoa_pleco
    usually 20%-30% a week, and theres no way around water changes, they replenish needed minerals
    i think i will stick with a 55 G tank than as the salt will cost alot less than a 85 G

  8. #8

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    since I am deciding between a 55 G and a 85 G will the 85 give me a much larger range of fish to choose from or is it much the same ? and can I get any tangs in a 85 G ?

    cheers

  9. #9

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    20% to 30%? I was told 10% a week. Is that not enough for my 40 gallon?
    Well, 40g tank and 20g sump. I change 6g a week. Should I step it up to 12?

  10. #10

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    I wouldn't add any tangs to an 85g. That is not to say that you can't do it.

    If you were to put one in, you could only put ONE in and that would also limit what other fish you could add.

    You could do the following:

    Any ONE of the Ctenochaetus sp. tangs

    OR

    ONE Zebrasoma sp. tang. The species you could have are

    Yellow tang
    Black tang (if your budget allows and you keep fellow tankmates to a minimum)
    Scopas tang
    Gem tang (same as the black tang, but are about 4-5 times the price)

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