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Thread: Question about HMF...

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    Default Question about HMF...

    Hello everybody .
    I'm setting up some new tanks for twb and wondering weather this kind of HMF effective or not .
    20130128_185937.jpg
    20130128_190154.jpg

    My main concern is will the water circulate rightly ? Hyoushoku , or anyone experienced this for shrimp tanks please help me out , pros and cons of this HMF for shrimps ?

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    Shrimpy Lover hyoushoku's Avatar
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    You mentioned my name explicitly, thus I have to answer. LOL!!

    This sort of filter is effective but it has it's flaws and they are:
    1. Single layer and you can have a pre-filter that constantly cleaned or replaced. Usually I like filter to have multiple layer with fine filter before bio media/sponge. In this case, I can just wash or change the pre-filter and never wash my bio media/sponge.
    2. It is a internal filter and when you pull it out to clean, a lot of gunk will drop into the tank. Usually, this is not a problem. However if the bio-load is too much, sometime those gunk contains toxic.

    In conclusion, if you do not over-feed or don't have too much bio-load, this filter should be fine.
    shrimpydaddy.com

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    Why is the airlifter in the filter? Usually it is placed behind. It makes no sense to use a large HMF with such a small filter capacity. It cannot work properly that way.

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    Frank highlighted something important that I never realised; did not see the picture.

    How come your HMF is using air-driven pump? HMF should be in a way that you create a segregated filter compartment by drawing out much more water out of the filter compartment to let the water auto-level itself. This will force water through the HMF. As such, it is usually coupled with a powerhead/eletric-driven pump to draw out the water.
    shrimpydaddy.com

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    Air-driven is no Problem. I run my racks with 2 large air pumps to save energy costs.
    The Problem is the Arrangement.

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    Hi Frank,

    Just a curious question. In my area, I never see big air-driven pump (or maybe no one carries; powerhead is cheaper than air-pump here). All that we see, the largest are just a 16/22 tube with air pumping to the bottom.

    Can we have a picture of how the large air-driven pump looks like?
    shrimpydaddy.com

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    So Hyoushoku , a pre-filter with sponge is a much more easier-to-clean way and the effect is equal , too ? I just love the way shrimps climbing on the HFM wall , tho Still wanna try it out . Please show me the best way to set up this HMF system

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    I'm not a HMF expert, thus not sure it can achieve a pre-filtering effect like other filters. Since Frank is here, you can check with him; HMF is very popular in Europe.

    I will explain about the pre-filter I mentioned. Usually in HOB, canister or even sump filtration, people will do filtration in this sequence: coarse -> medium -> biological -> fine.

    What I always do is in this sequence: fine -> biological -> biological -> super fine.

    For the fine mechanical filter, it will be place upfront before the "dirty" water enters the filter or sump tank. Most people will not do that as they believe this will filter away bacteria but I don't find it so. By placing a fine mechanical filter upfront, you just need to clean or replace it frequently (it also easily accessible) and the biological media can don't even wash virtually forever. The super fine mechanical layer will have to be changed once in awhile.

    My favourite choice of fine mechanical filter is either polywool or micron pad, which are cheap and good. You can discard them instead of spending time washing them.
    shrimpydaddy.com

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    Quote Originally Posted by hyoushoku View Post
    Hi Frank,

    Just a curious question. In my area, I never see big air-driven pump (or maybe no one carries; powerhead is cheaper than air-pump here). All that we see, the largest are just a 16/22 tube with air pumping to the bottom.

    Can we have a picture of how the large air-driven pump looks like?
    Here´s the smaller one - Resun LP60
    IMG_0016.JPG

    Powerheads make sense for a few tanks. I run nearly 100 :-)

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    That's a massive one!!!

    Thanks for sharing.
    shrimpydaddy.com

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