Sand/bead filter for indoor pond?

[Manhattan63]

I'm looking at a 15,000 litre (3300 imp/3960 US Gallons) indoor pond (for Koi).

Also being in the process of converting some more space into fish related space, I'm feeling the pinch. I appreciate I should never save money at the expense of decent filtration, but are sand/bead filters that important indoors (especially when they have their critics for even being included)?

 

[thatfrontguy]

How many fish do you plan on having, if you are going to stock your indoor pond heavy, i would not skimp on filtration. I have an indoor 1500 gallon koi tank. I personally think the pressurized bead/sand filters are a waste of money. You can build a diy filter out of 55 gallon plastic drums and have for filtration than the pressurized filters. Also dont forget to atleast have a 40 watt uv light.

 

[Fishwhore]

the sand bead filters are used for biological bacteria to grow on. like stated before me you can build/buy other filters cheaper and that work better. get some drums and throw lava rock in it.. it will clean/buff the water and create surface area for the benifcial bacteria to grow on. aka wet dry filter for the pond.....

 

[Muske]

+1 with drums or totes.

Lava rock in a pinch. Many other medias avail. that won't clog like lava rock does.