What is Alkalinity?

  1. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    see below (moved old thread)
     
    Last edited: Sep 13, 2017
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  2. Aliasger

    Aliasger Active Member

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    Hi i have two Marine FO tanks of 4000 US gallons each.
    The tank parameters for both the tanks read
    TANK 1
    pH- 8.2
    Calcium- 500
    Alkalinity- 16dKh

    TANK 2
    pH-8.1
    Calcium- 480
    Alkalinity- 11dkh.

    Both tanks use tropic marine sea salt. i have lost about 5-6 fish in Tank 1. Is it due to alkalinity?
     
  3. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    I doubt the fish died due to alkalinity being high in tank 1. Tank 2 is fine.
     
  4. Aliasger

    Aliasger Active Member

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    How can i reduce the alkalinity then ?
     
  5. Aliasger

    Aliasger Active Member

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    Oh sorry!! what could else be the problem. As there was no ich no disease out break in the tank.
     
  6. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    Both tanks?
    What type of fish?
    Over what time period did they die?
    Any symptoms on the fish that died?
    What sorts of filtration do you have?
    How long has the tank been set up?
    How long were the fish in it the tank?
    Are other fish in the tank OK?
     
  7. Aliasger

    Aliasger Active Member

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    The fish that died were, emperor, koran angel, one moorish idol and one powder blue and today another 2 heniochus. The fish didn't have anything on it's body. As for now i can see that my blue tang is little stressed while other fish have been doing well.
    For filtration i am using TMC system 10,000 commercial filter with ozonizer. The tank has been set up for over 6 months with fish and over a year with the setup. The fish were for 2 months.
    Few of the fish i can see some spots however other are doing just great.
     
  8. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    I doubt this is a chemical issue, unless there is ammonia in the water, so I'm going to move it to the fish forum.
     
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  9. Aliasger

    Aliasger Active Member

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    ok so then..
     
  10. eatbreakfast

    eatbreakfast Fish Nerd Staff Member Team R2R R2R Supporter R2R Excellence Award Showcase Editor Expert Contributor Partner Member Partner Member 2018

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    Sounds like velvet to me.
     
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  11. Humblefish

    Humblefish Dr. Fish Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor Louisiana Reef Club Partner Member 2018

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    +1 Can the OP describe the spots he is seeing and/or provide photos.

    Are they white spots? Can they be counted on the fish or are they too numerous to count?
     
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  12. melypr1985

    melypr1985 totally addicted Staff Member Team R2R R2R Supporter R2R Excellence Award Reef Squad Leader Expert Contributor Article Contributor

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    I'd like to see pictures as well. I am suspicious of velvet as well here.
     
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  13. aykwm

    aykwm Research Addict! R2R Supporter Build Thread Contributor

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    ^^ Agree with photo, do you notice other symptoms. It might also be flukes as most cases they are invisible, or internal infection (did you notice white stringy poop?)
     
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  14. Maritimer

    Maritimer Well-Known Member R2R Supporter R2R Excellence Award Reef Squad Leader CTARS Member Build Thread Contributor

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    When did you last add any new creatures, rocks, corals or plants to the tank, and what did you add?

    ~Bruce
     
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  15. 4FordFamily

    4FordFamily Tang, Angel, & Wrasse Addict R2R Supporter R2R Excellence Award Reef Squad Leader Build Thread Contributor Article Contributor Partner Member 2018

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    Agree with the other 5 posters -- velvet.

    Some strains of velvet mainly attack the gills and you'll see little or nothing on the fish.

    The fish may also show the following symptoms: hide from light, become more cryptic, swim in to powerheads, breathe heavily, scratch, flash, lose color, sometimes in blotches (especially in large angels), and sometimes swim erratically.
     
    Last edited: Sep 14, 2017
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