Customer Reviews

Rating: 3.2 of 5 stars 23 Reviews 23 Reviews 3.3 out of 5 Stars

74% Recommend

74% of reviewersrecommend this product

Rating: 3.2 of 5 stars 3.3 / 5

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Fluval Aquarium Nano Underwater Filter

Fluval Aquarium Nano Underwater Filter

  • Most Helpful Positive Review

    Read All 12 Positive Reviews

    great little filter

    By Chelle on Feb 21, 2021

    I just bought a second, love this filter but you have to make sure it's fully sealed! Fully submersible.

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  • Most Helpful Critical Review

    Read All 11 Critical Reviews

    Piece of crap

    By Toadman69 on Mar 10, 2021

    Fitting on the filter for the spray bar was broken out of the box so I was unable to attach the spray bar. Pretty powerful, a bit too powerful if your tank is shallow or you have frogs or turtles

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23 Reviews

Showing 1-10 of 23 Reviews

  • 1 out of 5 stars

    Piece of crap

    By on

    Fitting on the filter for the spray bar was broken out of the box so I was unable to attach the spray bar. Pretty powerful, a bit too powerful if your tank is shallow or you have frogs or turtles

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  • 1 out of 5 stars

    Did not come complete.

    By on

    It came already open. It was missing the spray bar, a pieces of foam, and two other small pieces as well. Looks like a returned item that they borrowed parts from.

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  • 5 out of 5 stars

    great little filter

    By on

    I just bought a second, love this filter but you have to make sure it's fully sealed! Fully submersible.

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  • 4 out of 5 stars

    Very quiet filter

    By on

    I have my tank next to my bed and its very quiet. I have to listen for it to hear it. I use this for a 20 gallon tank with bettas and endlers and it seems to be keeping the tank pretty clean without creating too much movement

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  • 1 out of 5 stars

    Loud and inefficient

    By on

    The filter was loud and kept me from being able to sleep. My betta fish was also disturbed by it. The flow was strong. It didn’t filter the tank the way my Whisper IQ 10 did. I would recommend that filter for betta fish. As long as you turn the flow down to less than half. It catches more debris and the outflow is gentle.

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  • 5 out of 5 stars

    Terrific product, well-built, easy to install & maintain, great price.

    By on

    Although it's only rated for up to a 15 gallon tank, we have it installed in a 29 gallon. After a 5 minute set-up and installation it took only 12 hours to clear the tank's water from cloudy to crystal clear. (Granted we have NO fish in it, hahaha), But we love the (adjustable) overflowing trickle sound it produces and this does it perfectly. We've used the older, larger external Fluval filters and they're great, but this one's all we need. I only wish Fluval made a similar one for up to 30-40 gallon tanks but I suppose I could purchase another one since they're very inexpensive.

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  • 3 out of 5 stars

    not underwater

    By on

    It is a nice filter but it being an underwater filter is completely false

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  • 3 out of 5 stars

    Seems to be hit or miss

    By on

    I bought two of these, for my 10 and 20 gal tanks, as additional filtration and flow, both tanks also have sponge filters. The one in my 20g works fine, except for the tendency to form air bubbles in the canister, requiring weekly adjustments/maintenance. And neither of them fully close any more. The second one is more trouble and now requires daily maintenance, and the impeller is VERY noisy when not perfectly upright.

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  • 5 out of 5 stars

    Great little filter

    By on

    I like moving from one tank to another for extra added cleaning. Works fast and adds oxygen back into the water.

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  • 1 out of 5 stars

    Way to strong

    By on

    Filter intake sucked my betta right up against it. Thank God I was keeping an eye on it.

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