Filtering a tank on the floor

  • We are currently upgrading MFK. thanks! -neo

BanditAquatic16

Feeder Fish
MFK Member
Jan 18, 2026
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Tamworth
Hi all. I’m about to upgrade my smallest growout tank. Going from a Jewel 110l tank to a custom 50x20x21 tank. It’s the biggest tank I could fit where it’s going. Because it’s going under my 450l tank it’s going to be pretty much on the floor which means I can’t use one of my spare canister filters. I have maybe 6 inches of room above the tank so really an overhead filter is out. I did consider internal filters but I want to keep the tank as open as possible to get the fish to grow as well as they can. I can’t tie it into the sump that will be filtering the 680l and 450l. How would you guys filter this tank? Because I am running out of ideas. I need something powerful as I have a lot of small fish that will grow big in that tank. Cheers!
 
Why can’t you use a canister if the tank is on the floor?
Once the canister is primed and running it will work just the same as if it were under the tank.
I had a 40B w a fluval 306 sitting beside the tank; no running issues.
I have a friend that had a 300gal Rubbermaid stock tank w 2 x FX6’s and 2 x 406’s sitting right in the floor next to the stock tank; no running issues.
You could run 3 fluval AC110 HOB’s as an alternative 🤷🏻‍♂️
 
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