Too Many Filters?

Discussion in 'Filters and Filtration' started by Tpane27, Aug 7, 2019.

  1. Tpane27

    Tpane27Valued MemberMember

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    I run a fluval c3 on my 29 gallon with a decent sized air stone. Would it be too much to have a smaller, less powered underwater filter as well? Just to help with maintaining good water parameters. Everything seems to be fine just wondering if there’s ever such thing as too much filtration
     
  2. fissh

    fisshWell Known MemberMember

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    there is no such thing as over filtering. unless your fish are bouncing off the side of the tank.
     
  3. Dray

    DrayValued MemberMember

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    Generally speaking, it is impossible to have *too* much filtration unless your fish are too sensitive for the current. Even then, you can reduce the current by using a spray bar, by positioning plants/decor in front of the return, or by removing the air stone.
     
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    Tpane27

    Tpane27Valued MemberMember

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    Any recommendations for a smaller filter that works well that’s underwater?

    Any underwater recommendations that are somewhat small but strong?
     
    Last edited by a moderator: Aug 11, 2019
  5. DylanM

    DylanMWell Known MemberMember

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    Are you referring to a sponge filter?
     
  6. fissh

    fisshWell Known MemberMember

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    Most of the cheapo submergible filters that you can buy online will work good as a backup filter.
     
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    Tpane27

    Tpane27Valued MemberMember

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    Perhaps! I’m not very well educated on underwater filters or types
     
  8. DylanM

    DylanMWell Known MemberMember

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    There's pretty much just sponge filters, as far as I'm aware. Under gravel filters don't really exist anymore and have tons of problems, and the "underwater" HOB filters are more expensive and substantially worse than a normal sponge filter. You probably want a sponge filter.
     
  9. Dray

    DrayValued MemberMember

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    Tpane27

    Tpane27Valued MemberMember

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    Gonna look into this now. Thank you!

    How do sponge filters work in terms of using bio media?
     
    Last edited by a moderator: Aug 11, 2019
  11. DylanM

    DylanMWell Known MemberMember

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    The sponge is the bio-media. The water passes through the sponge, which builds up bacteria over time. Way more useful for filtration than the stock cartridge setup that most HOB filters come with.
     
  12. GlennO

    GlennOValued MemberMember

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    I use an Eheim Pickup 200 as a back up filter. They are my favourite internal power filters because they are a simple design with just a large sponge that is easy to access without having to remove the filter from the tank.
     
  13. JayH

    JayHValued MemberMember

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    The Ziss Bubble Bio Moving Bed filter has had some good reviews. It's not expensive.

    Undergravel filters most certainly do still exist. I just bought one a few weeks ago. As for the "tons of problems", these seem to exist primarily in people's heads and on the balance sheets of filter manufacturers.

    I would probably agree that a sponge filter is the simplest and most effective approach to a secondary filter, but there are other viable options.
     
  14. fissh

    fisshWell Known MemberMember

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    Tpane27

    Tpane27Valued MemberMember

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    Last edited by a moderator: Aug 11, 2019
  16. Islandvic

    IslandvicWell Known MemberMember

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    I think the Aquatop might be built similar to some Azoo brand sponge filters I bought on clearance at the beginning of the year. I've got 1 large Hikari Bacto Surge sponge filter that is built identical also. I think the Chinese copy each others' plans.

    There were designed to plug in the air line tubing to a port, and the air was released at the bottom. I tried it and the air bubbles coming out were large and I thought it hampered the flow.

    I took it all apart and used wire cutter to snip the inner plastic to allow me to slip the airline tubing into the inside of the sponge filter along with an air stone.

    This method produced smaller bubbles and more of them. Water flow was greatly enhanced also.

    Does your setup use an air stone? If so, is it an older one? They become clogged over time.

    If you hold the air line and pull the sponge filter's lift tube to the water line, you can see how much water flow out of it.

    The sponge filter I prefer and highly recommend is from the brand ATI and their Hydro Sponge line of sponge filters. Their parts are interchangeable, and have a modular design. They can be stacked together also. I have a fine foam sponge filter stacked on top of a coarse foam sponge filter in our 55g African cichlid tank for example. I buy my ATI products from kensfish.com .
     
  17. OP
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    Tpane27

    Tpane27Valued MemberMember

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    I might see how this works for a little. The bubbles are larger rather than small but still create a lot of water movement. The airline plugs right into it and I can’t see the inside so I may end up taking it apart.
     
  18. coralbandit

    coralbanditFishlore VIPMember

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    I run the Aquatop sponges in many of my tanks with my AquaClear HOBs .
    You will be all set and very happy with your choice .
    Just pull it out every now and then and give it a squeeze in water change bucket ..
    Most of the Aquatops have a built in air diffuser that work great and need only occasional cleaning ..
    Enjoy !
     
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    Tpane27

    Tpane27Valued MemberMember

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    Thank you! It doesn’t appear the sponge really pulls in water. How does the sponge filter work? I only ask since you have the same one. There’s plenty of bubbles but it doesn’t seem to suction all that well. Is it more of a bio filter?
     
  20. JayH

    JayHValued MemberMember

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    For volume of water moved per volume of air injected, I don't think you can beat a well crafted Czech lift tube. Swiss Tropicals sells some precision made German ones that move up to four liters of water for every liter of air injected. These are what they use in their sponge filters and their matten filter kits.
     
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