Koralia 3, in a 4' tank?

Discussion in 'Filters, Filtration and Pumps' started by Tigermoth, 3 May 2009.

  1. Tigermoth

    Tigermoth Member

    Messages:
    56
    Hi

    Just wondering if a koralia 3 would be too much for a 4' (218l) planted tank.

    I recently bought a 1600l/h powerhead to use with water changing. I tried it out as a powerhead without the emptying hose attached and omg, it created an unbelievable disturbance in the tank. The koralia 3 is twice the turnover, but apparently doesn't send out as narrow a jet of water.

    Any thoughts? I've never seen a koralia in action.

    TIA
     
  2. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    koralia's are much better due to them having a large grill which dissipates the flow over a larger area,

    It will be fine IMO, you could get away with a K2 which is 2300l/ph if you wish.
     
  3. Tigermoth

    Tigermoth Member

    Messages:
    56
    Cheers Aaron,

    It's the only thing left I can think of to try and knock the GDA on the head.

    CO2 is right, ferts are right (I think). Only got 2wpg lights when on full, but have turned that down from 3 tubes to 2 (now 1.4 wpg) because of GDA.

    Would a koralia 3 give me more chance of defeating the GDA than a koralia 2 in your opinion?
     
  4. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire
    low levels of phosphate can cause GDA, many people have success when raising to 2-3ppm

    What fert are you using and when are you dosing? If it is dry powders then please state the quantities mixed up.

    Thanks.
     
  5. Tigermoth

    Tigermoth Member

    Messages:
    56
    20g KNO3 in 250ml DI water, dosing 22ml 3 times a week
    7.5g KH2PO4 in 250ml DI water, dosing 11ml 3 times a week
    15g trace in 250ml DI water, dosing 22ml 3 times a week

    4'x18"x15" tank.

    Cheers
     
  6. john starkey

    john starkey Member

    Messages:
    1,593
    Location:
    worcester
    Hi I have a k2 in my 5 footer and I find it's plenty,good flow all round.
    Regards john
     
  7. Tigermoth

    Tigermoth Member

    Messages:
    56
    Thanks John
    - - -
    Aaron,
    In the above ferts dosing.

    "7.5g KH2PO4 in 250ml DI water, dosing 11ml 3 times a week"

    That equates to 1ppm I think? Shall I up that to 22ml for a while and see what happens?
     
  8. aaronnorth

    aaronnorth Member

    Messages:
    3,955
    Location:
    worksop, nottinghamshire

    Yes it is 1ppm, you could try raising it to 22ml, It should work, if you get a powerhead then point it towards the front glass, or currently, point your filter to the front so it hits the glass and runs down.
     
  9. Tigermoth

    Tigermoth Member

    Messages:
    56
    Will up KH2PO4 to 22ml. External filter's spraybar is at the top, pointing to front glass. Koralia on its way. :)

    Cheers
     
  10. marwil

    marwil Newly Registered

    Messages:
    23
    Hi I have a koralia 3 in a five foot tank and found it too much my discus absolutely hated it and my cardinals weren't too keen either so I am going back to my koralia 1 which I didn't really think was up to the job but if the fish weren't happy then hey. So I will probably have a koralia 3 for sale soon if anyones intersted only used for a couple of days.
    Mark.
     

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