55 gallon water barrel setups?

[eon aquatics]

Would it work to use plant root filtration in one?

 

[eon aquatics]

could i make a guppy breeding project in one?

 

[Friller2009]

I raise fish in these outdoors. Probably have about 15. Work well.

Rob bobs aquaponics did a vid on them, i’ll Post some pics later when I get back home

 

[eon aquatics]

how about one that is half full and with pothos roots as natural filtration with a canister filter?

 

[duanes]

I have used them as sumps.
The one below worked well in the limited space under my basement stairs, as a sump for 5 tanks.

above during a water change. Below next to a fluidized reactor.