Est Tank want to add filter question

Discussion in 'Filters and Filtration' started by Hevic, Mar 28, 2010.

  1. Hevic

    HevicNew MemberMember

    Our comets spawned just over summer, and we set up a 75 litre tank, which currently holds about eight 1 inch fish.
    It's currently unfiltered, and I know it should be, but i'm worried introducing the filter will knock off all the fish, once the nitro cycle starts.
    30% of the water does get changed every week. And it is full of plants :)

    So the short of it is:
    Is there a way that a filter can be put into the tank without killing all the fish?
    I really dont want to kill the little guys!

    Note: i dont really know any of the specs of the tank right now sorry.
  2. Jaysee

    JayseeFishlore LegendMember

    You are concerned a filter will kill the 1 inch fish?
  3. bubblynutter

    bubblynutterWell Known MemberMember

    Jaysee, he is concerned that there is potential for a mini cycle from adding a filter to a previously unfiltered tank.

    I would suggest that he adds filter media to the established tank to get seeded for 1-2 weeks, then addes the new filter to the fry tank. Should prevent any mini-cycles.

    I would strongly recommend testing the parameters of the fry tank, and posting them here so we have more to go off...
  4. OP

    HevicNew MemberMember

    Er, I'm a she :p
    Thanks bubblynutter, I was thinking of putting in the media for a week or so before starting the filter, glad you suggested it too :)
    I'll have to get a new test kit, ours is pretty old and missing pieces :p
  5. Nutter

    NutterFishlore VIPMember

    Welcome to Fishlore Hevic. :;hi2

    Good suggestion there from Bubblynutter. To be honest though if the tank is already cycled, then adding a filter won't result in an ammonia spike anyway. All that will happen is the good bacteria will colonise the filter media. If you have lots of plants they will consume most of the ammonia that may be produced anyway. They need to be healthy plants that are growing well though.
  6. bubblynutter

    bubblynutterWell Known MemberMember

    agree with nutter. Best to provide parameters so we can provide accurate advice. Just my opinion.
  7. Nutter

    NutterFishlore VIPMember

    YUP!! Exact parameters are always good.