Building a pond filter out of blocks and bricks

[davemal]

Got my pond done, don't want to spend a fortune on a filter ….. so I am going to try to build one. Gravity fed starts with a vortex then into a giant sump filter.... I plan to make it up as I go.

 

[davemal]

Any info would be a great help, I will also use the old box filter from my old pond at some point . New Jaboa pump will turn water over 3x faster using less electric. 10k flow with only 85 watts.

 

[BichirKing]

how big is your pond? how big of bio load?

 

[davemal]

7500gals, got an area 12ft x 4ft to build filter in
I have 2 large box filters off my old pond to use aswell

 

[Bertie07]

I had a regular pond filter on my pond and it was a lot of work to clean and maintain so I built a bog filter, it was only small but worked great and got the pond crystal clear in about a week. I think they’re the best filters for ponds and a 12 x 4 ft space would a great sized one for they pond. Pleanty of room. They say it has to be 30% of the ponds surface area in size for a heavily stocked pond so that should be a good size. They’re also cheap to build

 

[BichirKing]

bog filters are nice when they work properly and don't add to the bio load with decomposing litter. a 55 gallon drum with gravel/sand is probably the biggest bang for the buck and could fit that space.
http://www.koiphen.com/forums/showthread.php?36550-55-Gal-Drum-Sand-and-gravel-filter-DIY