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Thread: Difference of using hang-on filter and sponge filter

  1. #1
    Bocca
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    anyone can advise the difference of using hang-on filter and sponge filter for shrimps tank? any advantage?
    have visited some lfs, they have shown me their shrimp breeding tank was fitted with sponge filter and i dont think they have washed it either, as they looked dirty...!!!

    i personally used hang-on(ehiem) filter for my 1.5ft shrimps tank...so far i dun have any issue yet..

    any advise.
    thxs

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    IMO,

    Hang ons are ok especially for small tank less than 1ft. The water flow rate is weak for most hang on filters....therefore tanks using hang ons must watch out for overcrowding....too many shrimps and not enough oxygen.

    Spong are better as they are submerge in the tank.....although dirty...after a while ...those dirt are also food for shrimps. Especially baby shrimps they need those dirt(micro organisms) to grow.

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    Quote Originally Posted by simcb
    IMO,

    Hang ons are ok especially for small tank less than 1ft. The water flow rate is weak for most hang on filters....therefore tanks using hang ons must watch out for overcrowding....too many shrimps and not enough oxygen.

    Spong are better as they are submerge in the tank.....although dirty...after a while ...those dirt are also food for shrimps. Especially baby shrimps they need those dirt(micro organisms) to grow.
    do we leave the sponge alone until the day we decided to revamp the tank? i.e. no need to wash or change as there is "food" built up?

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    Quote Originally Posted by kross
    do we leave the sponge alone until the day we decided to revamp the tank? i.e. no need to wash or change as there is "food" built up?
    I guess wash with conditioned water once in a while..... 1 mth once or every fornightly depending on your bioload .... not sure cause i am using ext can filter.

  5. #5
    Ljung
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    with hanging filter, u cant keep floating plants e.g. duckweed, frogbit....

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    Hi,
    the hang on filters are not that bad but they have some disadvantages in comparison to sponge filters. They have often less filter medium than even the smallest sponge filter, so they cannot do their job that good. Shrimps love dark places with a strong current, so they try to get inside the filter. But often they get injured (you can se black lines on the shrimps body later on) and die after a few days. So you have to cover the inlet of the sponge filter, a small piece of sponge does the job well. But this reduces the flow rate and does not make the filter better.
    Sponge filters are better for the biological filtration, even cheaper and safe for the shrimps. You don't have to clean them as often as hang on filters. The "dirt" reduces the flow rate a bit but that's it. So if you forget to clean it, almost nothing happens. I wash my sponge filters in tank water during a water change (in the bucket, not in the tank) only 3-5 times a years, if the flow rate is rather small. There is no need to clean them more often. BTW, this article shows how to build a simple sponge filter: DIY Sponge Filter

    best regards

    Robert

  7. #7
    Bocca
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    thxs guys for the comments.

  8. #8
    janazr
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    Hanging filter is not safe for breeding shrimps, fries
    will get trap and die.
    Last edited by janazr; 1st Apr 2005 at 11:57 PM.

  9. #9
    President :p Walter's Avatar
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    Quote Originally Posted by janazr
    Hanging filter is not safe for breeding shrimps, fries
    will get trap and die.
    If really have to use, you can place a sponge at the inlet to prevent shrimps falling in
    - LaLaLa~!!



  10. #10
    jojoecute
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    Default Hang On Filter

    I had attach a small sponge on the inlet...

    See picture
    Attached Images Attached Images

  11. The Following User Says Thank You to jojoecute For This Useful Post:

    myles (13th Apr 2011)

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