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    jeanne13's Avatar
    jeanne13 Posts: 1, Reputation: 1
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    #1

    Apr 3, 2009, 03:31 PM
    Green algae in my goldfish tank water
    I have a 55 gallon fish tank with 2 very large goldfish (6 in from tip to tail). Three weeks ago I started to have green water after I did a 25% water change. I t came on very fast and any algae killer I put in was a waste of time. After a week I did a 50% water change and the same thing has happened. It is not on the tank it is in the water. If I take the glass top off it drips green water. I have just tested my water and these are the readings:

    GH -30
    KH - 40
    PH -6.5-7.0
    NO2- 0.5
    NO3-a light 40

    My question is what is wrong with my water? It came on very suddenly and I have never had anything like this before. Another thing is that the temperature is 70 and the light is a year and a half old and has two 17 watt aquarium bulbs. Also the fish don't seem to be adversely affected by it. Thank you for any help.
    hulk1371's Avatar
    hulk1371 Posts: 22, Reputation: 2
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    #2

    Apr 3, 2009, 06:00 PM

    My tanks grow algae very fast also. Everything I have been told is that if the algae is healthy than the water must be healthy. I have found that chinese algae eaters are very effective at getting rid of the algae. They can grow very fast and are very active fish they have done a great job at keeping the algae levels down in every aquarium I have
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