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  1. #1
    Senior Member LeahK's Avatar
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    My tank water has turned blue--why?

    This is kind of weird, I think, and I hope one of y'all can tell me what's going on.
    About a month ago, I did a routine water change on my 55. In addition to my bucket, I use some translucent gallon jugs for changing water. As I was pouring the old water into the sink, I noticed that it looked quite blue. It looked like the same shade of blue that tank water can turn when you use certain medications, but my tank is not medicated. I filled up one of the gallon jugs with tap water and compared it to a jug full of tank water, and sure enough, the tank water was blue.
    I thought maybe I was overdoing it with the stress coat (my water conditioner), so I got out a syringe so I could measure exactly 1/2 ml of stress coat per gallon. It's been about a month of frequent water changes with precisely measured stress coat, and the water remains blue. When I look at the tank from the front, I can't tell, but when I view it from the side, the long way, it's definitely blue.
    The fish are all ok, but I'd like to know what's causing the color. Water changes don't seem to diminish it, so I'm guessing something in the tank is producing it. There are no fake decorations in there. There's only the fish, some driftwood, anubias, java moss, and two red clay flower pots. The gravel is sand-colored. Could the color maybe be caused by some kind of algae? I'm not running any carbon, but I'm planning to go buy some soon. Any ideas?
    Thanks!
    Tankless.





  2. #2
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    I don't have a clue, but my 35g has pink water from tannins and berry flavored Tums. It's kinda weird.




  3. #3
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    maybe your eyes are playing an illusion on you? :O



  4. #4
    "Up to my neck" Gill Roy's Avatar
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    Have you had any plumbing work done in your house/building?????
    90 gal. coral and fish
    65 gal. fish only
    120 gal. reef in final build stages



  5. #5
    Plants need meat too jpappy789's Avatar
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    My first thought is something to do with your water supply itself. Have you called to see if anything has been added recently?
    20 gallon long planted
    My carnivorous plants

    Quote Originally Posted by Rbishop View Post
    I like the movie Goonies...pretty sure it was a historical documentary....



  6. #6
    Senior Member LeahK's Avatar
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    Well, but when the water comes out of the tap, it's clear. If I fill two glasses, one with tank water and one with tap water, the tank water is blue and the tap water is clear. When I do water changes, it's with clear tap water. Something makes the tap water turn blue after I put it in the tank.
    Tankless.



  7. #7
    ...meh? tekonus's Avatar
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    Quote Originally Posted by paperdragon View Post
    I don't have a clue, but my 35g has pink water from tannins and berry flavored Tums. It's kinda weird.
    ...


    Quote Originally Posted by paperdragon View Post
    berry flavored Tums
    WHY?!?!?!



  8. #8
    Senior Member SilverDollarMan's Avatar
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    are your buckets or jugs blue?

    they could be making your water blue, maybe the paint is coming off of them.

    Just a guess.
    60g - 4 Angels, 1 Sev, 10 Cories, and 1 BN Pleco
    60g - Peacock Cichlid/Mixed Malawi Tank
    10g - Planted - 4 Black Neons and 8 Amano Shrimp



  9. #9
    Plants need meat too jpappy789's Avatar
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    Quote Originally Posted by tekonus View Post
    ...




    WHY?!?!?!
    Calcium supplement for snails I imagine.


    How old is the tank itself? Was it used for anything other than fish? Maybe something is leaching...
    20 gallon long planted
    My carnivorous plants

    Quote Originally Posted by Rbishop View Post
    I like the movie Goonies...pretty sure it was a historical documentary....



  10. #10
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    Quote Originally Posted by tekonus View Post
    ...

    WHY?!?!?!
    ...
    Quote Originally Posted by jpappy789 View Post
    Calcium supplement for snails I imagine.
    Yup.




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