Problem With Cycling

Discussion in 'Freshwater Beginners' started by blackguilty, Aug 21, 2018.

  1. blackguilty

    blackguiltyNew MemberMember

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    Hello, i built a new tank for my juvenile swordtails. I upgrade the tank from 15 gallon to 40 gallon. I move 2 sponge filter, cycled, from the last tank. It's started about a week ago. There are 25 juveniles there and i put 6 corydoras in the tank and 2 adult molly. The problem is, some fish started to die. Yesterday i lost 3 of the juvenile. In total i have lost about 10 of them and 4 corydoras. I have do water changes every 2 days. But after i do water change, i'm still losing my fish. Any problem have i done to my tank? There are some moss in the tank, but i just added when i started the tank, so it's just not too much. Can anyone help me with the problem? And any solution?
     
  2. AquaticJ

    AquaticJFishlore VIPMember

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    What are your parameters?
     
  3. RainBetta

    RainBettaWell Known MemberMember

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  4. OP
    OP
    blackguilty

    blackguiltyNew MemberMember

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    I haven't checked the ammonia yet. The temperature is 80 degree. The mollies and cories just addition to the tank, for the community.
     
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