Fluidised Bed Filter

[ChrisC]

Hi,
I'm building a Fluidised Bed Filter and was wondering, after initial testing, how much does the sand need to be "fluidised"? I'm running a Juwel 400lph powerhead (although, it's about 8 years and it's output is probably more like 50lph! ), and it just doesn't seem to be disloging the sand enough. Is there a way of spreading out the flow of water from the powerhead more.

Thanks,
Chris

 

[demonmagus]

yes, yes there is.

Now maybe when someone who knows what your talking about comes along, they may be able to tell you.

 

[ChrisC]

yes, yes there is.

Now maybe when someone who knows what your talking about comes along, they may be able to tell you.

My god your a dumb ass!

http/freshaquarium.about.com/cs/filtrati.../fbedfilter.htm

Basically, the fluidised bed filter consists of a filter box, with a bed of sand at the bottom. A water current is passed through the box which disturbs the sand and "fluidises" it. This sand has a phenominal surface area, which provides massive amount of surface area for bacteria to grow on.

Thanks,
Chris

 

[OohFeeshy]

I *think* there was another topic about FBFs that covered pretty much everything, have you googled it, theres a loy of aquarium DIY sites that cover them.

 

[ChrisC]

Yep, theres loads of sites about them but none of them mention the actual movement of sand. I've search these forums though.

Thanks,
Chris

 

[demonmagus]

damn you chris and your infernal smell!