HOW TO: Build an aquarium sump – fluidized moving bed filter

Get the ultimate DIY book ►

Follow me ►

In today’s video, i show an example on how to build a basic moving bed sump for your aquarium, while discussing the pros and cons.

How to build an emerged sump:
How to build a submerged sump:
How to build a fluidized sump:


The king of DIY


What do you think?


Written by The king of DIY

Content AuthorYears Of Membership


  1. Currently I'm using a 2500lph wavemaker and a 160lph airpump to circulate my k1 chamber. It's doing the job but I only want 1 thing to be powering it. What can I use? A powerful wavemaker?

  2. I am completely lost. I have a 420 aquarium with a 90 gallon tank underneath as the sump. The portion allocated for the k1 media measures 32.5" long x 18" deep x 23" tall. I don't feel the water up to 23". I leave about a 6" to 7" space for power outrages. How much k1 should I be using?

  3. I look at the fluidized media and how it floats around beating up against other media balls. I imagine little bacteria living on each piece of media as it goes crashing into another media halls smashing the little critters as it moves around the filter box, like planets colliding into others.
    So I prefer a media that stays put in one spot as the water moves through it, giving them a stable place to live.
    However there is probably some science behind the fluid media, maybe it grows bacteria better and all my thoughts are unfounded.
    We always used Bio Blocks or Bio Balls in saltwater tanks, so they're what I will probably use…guess I'm stuck in the 90's.



HOW TO: Build a full aquarium – tank, light, filter and stand 3/3 TUTORIAL

HOW TO: Build an aquarium sump – emerged trickle filter