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Thread: FX4 and FX6 filters: opinions, please

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    SCAPE Member 1000 posts, Semi-Pro SCAPEr geektom's Avatar
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    FX4 and FX6 filters: opinions, please

    Hey friends, anyone have experience with the larger Fluval canister filters?

    My stand I am building for the 135 project will only be 27" high, so interior vertical space will be limited.

    Because of that I am considering 2 FX4's, which would be expensive, but would give me great flow throughout a long tank, and fit nicely underneath.

    Looking for any and all opinions.

    Thanks!
    I am an old dog trying to learn some new tricks...

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    SCAPE Member Jr. SCAPEr kberg2498's Avatar
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    I think if you're spending 200$ on a filter, may aswell pony up for the fx6. FX4 is much shorter. I also look at the resale value of my stuff later on down the line aswell if I want to tear down a tank. FX6 > FX4 any day but if you happen to find a FX4 on a super sale get it. If you are looking for an fx6 I would look at petsmart and cycle through all their stores. Their stores all have different sales for it and usually only stock one.

    I have an fx6 on my 120 and its great. 10/10 would recommend if you have the coin to throw. Quietest filter I've owned by far too. Only wish they used vinyl tubing.

  3. #3
    SCAPE Member 1000 posts, Semi-Pro SCAPEr geektom's Avatar
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    I donít think I will have enough room underneath for the F6, once you take the hoses into account.
    I am an old dog trying to learn some new tricks...

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    SCAPE Member Pro SCAPEr Nick Shades's Avatar
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    I've always preferred redundancies, myself, and have preferred to run two canisters. Two fx4s is a good choice in my book.

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    SCAPE Member Just Planted CichlidBiker's Avatar
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    I went through this exact dilemma for the cichlids. I got 1 of each.
    The fx6 is much stronger on the overall flow than the fx4. This is very noticeable. The fx6 requires less service. The fx4 gets slowed down quicker since it only has 2 trays of filtering versus 3.
    2 fx6 is how i would do if i did it again though, no doubt, based on the differences over past few years.

    i have 110 gallon Tall tank. The brim stands a little over 5 foot tall & the pumps are on the stand base @ ground level.
    fx6 = bio balls in the sides, various mechanical filter pads in the center.
    fx4 = stock filter pads in the sides, ceramic media & bio balls in centers with a few mechanical filter pads.

  6. #6
    Sergeant of Marines 3000 posts, Grand Master SCAPER John7429's Avatar
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    1 FX6 is plenty



    New Tank Build Thread!


    Dont insult me with your low-balls


    Currently running: 270g monster fish, 180g monster fish, 180g planted (coming soon!), 80g community, 2x 7g planted, 6.7g planted, 2g planted, 2.5g opae

    Reptiles: 15+ turtles/tortoises, 1x Asian water monitor

    Birds: 1x African grey, 2x double yellow headed amazons, 1x umbrella cockatoo, 1x sun conure

    1x dog

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    SCAPE Member 1000 posts, Semi-Pro SCAPEr geektom's Avatar
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    Quote Originally Posted by John7429 View Post
    1 FX6 is plenty
    Do you think? I mean, my budget would appreciate that- I am just thinking about getting enough flow throughout the 6 x 2 footprint. That is why, along with the low height of my proposed stand, I was also considering 2 FX4. You know big tanks better than anyone, John.
    I am an old dog trying to learn some new tricks...

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    Sergeant of Marines 3000 posts, Grand Master SCAPER John7429's Avatar
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    Quote Originally Posted by geektom View Post
    Do you think? I mean, my budget would appreciate that- I am just thinking about getting enough flow throughout the 6 x 2 footprint. That is why, along with the low height of my proposed stand, I was also considering 2 FX4. You know big tanks better than anyone, John.
    If youíre worried about flow, add a power head

    Filtrationwise, fx6 is plenty. Good flow too.



    New Tank Build Thread!


    Dont insult me with your low-balls


    Currently running: 270g monster fish, 180g monster fish, 180g planted (coming soon!), 80g community, 2x 7g planted, 6.7g planted, 2g planted, 2.5g opae

    Reptiles: 15+ turtles/tortoises, 1x Asian water monitor

    Birds: 1x African grey, 2x double yellow headed amazons, 1x umbrella cockatoo, 1x sun conure

    1x dog

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    SCAPE Member 1000 posts, Semi-Pro SCAPEr Bongox3's Avatar
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    Ok, I’m not afraid to voice my ignorance...

    I’ve looked at getting an fx6 for years, but the price just pulls me away to cheaper filters.... what’s the upside to them as opposed to larger size hydors, sunsun, eheim, etc... ?.. besides flow, is there a noticeable difference in water quality/filtration worth the $$$...???? I’m running two of the large model hydors on my 100, which are good (nothing spectacular) - would the fx6 be much of an improvement over them????

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    SCAPE Member Just Planted aquamaniac's Avatar
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    Can't say enough about these fluval products. I'm running an FX5 on a tall 150 gallon tank with about 20-25 cichlids (4'wide x 2' deep x 3' tall). It has plenty of flow and I only clean it out every other month. Still going strong!

    I'm so happy with it that I have an FX6 just waiting for my next 150 long set up... coming soon

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    Sergeant of Marines 3000 posts, Grand Master SCAPER John7429's Avatar
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    Quote Originally Posted by Bongox3 View Post
    Ok, I’m not afraid to voice my ignorance...

    I’ve looked at getting an fx6 for years, but the price just pulls me away to cheaper filters.... what’s the upside to them as opposed to larger size hydors, sunsun, eheim, etc... ?.. besides flow, is there a noticeable difference in water quality/filtration worth the $$$...???? I’m running two of the large model hydors on my 100, which are good (nothing spectacular) - would the fx6 be much of an improvement over them????
    Yes.

    Way more media. Flow control. Auto priming. Back flush valve.

    I, personally, prefer to clean one large filter than two mediums



    New Tank Build Thread!


    Dont insult me with your low-balls


    Currently running: 270g monster fish, 180g monster fish, 180g planted (coming soon!), 80g community, 2x 7g planted, 6.7g planted, 2g planted, 2.5g opae

    Reptiles: 15+ turtles/tortoises, 1x Asian water monitor

    Birds: 1x African grey, 2x double yellow headed amazons, 1x umbrella cockatoo, 1x sun conure

    1x dog

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    SCAPE Member 1000 posts, Semi-Pro SCAPEr Bongox3's Avatar
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    Awesome.... I was afraid of dead zones, but it sounds like the fx6 will do the trick and excellent point of cleaning 1 vs 2.... looks like I’ll be getting a new toy pay day!!!! Thanks guys.

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    Sergeant of Marines 3000 posts, Grand Master SCAPER John7429's Avatar
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    DIY spray bar or splitter for 2 outputs is magic too



    New Tank Build Thread!


    Dont insult me with your low-balls


    Currently running: 270g monster fish, 180g monster fish, 180g planted (coming soon!), 80g community, 2x 7g planted, 6.7g planted, 2g planted, 2.5g opae

    Reptiles: 15+ turtles/tortoises, 1x Asian water monitor

    Birds: 1x African grey, 2x double yellow headed amazons, 1x umbrella cockatoo, 1x sun conure

    1x dog

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  19. #14
    SCAPE Member Just Planted OreoP's Avatar
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    On my 135gal I have the FX6 as the primary filter. Also have a Hydor that feeds a CO2 reactor, heater and UV light. Compared to the FX6, the Hydor is a PITA to clean and prime. If I have to do it all over again, it would be 2 x FX6. FX6's are so much easier to clean and re-assemble. Auto priming is a big plus. Also super quiet.

    For what it's worth I got a killer price from the LFS - I believe they are one of the sponsors here.

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    Water is Life 5000 posts, Officially addicted to SCAPE! Zenzu's Avatar
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    CFS500/CFS700 should also be considered. They are essentially clones of the fluval fx. They work fairly well and if they ever fail, you can easily swap out the pump. Cost a fraction of what the fluval counterpart does.

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    Sergeant of Marines 3000 posts, Grand Master SCAPER John7429's Avatar
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    Quote Originally Posted by Zenzu View Post
    CFS500/CFS700 should also be considered. They are essentially clones of the fluval fx. They work fairly well and if they ever fail, you can easily swap out the pump. Cost a fraction of what the fluval counterpart does.
    I've had horrible experiences with these. Plastic literally breaks apart and lots of leaking issues with the nozzles... =(



    New Tank Build Thread!


    Dont insult me with your low-balls


    Currently running: 270g monster fish, 180g monster fish, 180g planted (coming soon!), 80g community, 2x 7g planted, 6.7g planted, 2g planted, 2.5g opae

    Reptiles: 15+ turtles/tortoises, 1x Asian water monitor

    Birds: 1x African grey, 2x double yellow headed amazons, 1x umbrella cockatoo, 1x sun conure

    1x dog

  22. #17
    Water is Life 5000 posts, Officially addicted to SCAPE! Zenzu's Avatar
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    Quick taps are the weak point of this filter. They need to be serviced before use, if you ever have issues with them leaking you can either request a new o ring set or replace the taps for $10. I've had 3 and all 3 still work 4 years down the road. I paid $57 for one new and bought the other 2 used for $20 each.

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