Thanks for the feedback on the other filter design so I have now thought up a 2nd design.

http://www.djfroadshows.djworld.org.uk/filter2.JPG

Water enters at the top pipe and exits into the bottom of the 1st bay. The outlets are like that of the skippy filter to give a swirling action.

http://www.skippysstuff.com/minime1.jpg

Water then flows up through loosly packed course foam and maybe brushes like this.

http://www.skippysstuff.com/minime3.jpg

Then the water flows along into the 2nd chamber for biological filteration. It flows down and out in the same way to give a swirling action.

The water then flows through flocor and maybe some jap mat which will be heavily aerated. A 40mm outlet sends the water back to the pond.

For the pipework ive found these:

http://www.screwfix.com/app/sfd/cat/cat.jsp?cId=101311&ts=75002

They are only 21.5mm so if flow rate is restricting then I could easily double up the outlets.

What do you think?

Thanks,

Daniel

My pump is 1800 gph and the pump chamber is fed by two 40mm pipes so I doubt you're going to get much flow through 21.5.

Cheers, Im going to B&Q on Saturday so hopefully going to get what I need.

Are these fittings solvent weld? Do they sell any decent tubs/ contaners for filter building?

Thanks,

Daniel

Water enters at the top pipe and exits into the bottom of the 1st bay. The outlets are like that of the skippy filter to give a swirling action.

Water then flows up through loosly packed course foam and maybe brushes like this.

Then the water flows along into the 2nd chamber for biological filteration. It flows down and out in the same way to give a swirling action.

The water then flows through flocor and maybe some jap mat which will be heavily aerated. A 40mm outlet sends the water back to the pond.

For the pipework ive found these:

http://www.screwfix.com/app/sfd/cat/cat.jsp?cId=101311&ts=75002

They are only 21.5mm so if flow rate is restricting then I could easily double up the outlets.

What do you think?

Thanks,

Daniel

The 40mm tank connectors and pipe I use are push fit but don't leak or anything in my setup.

As for containers, they have quite a few different ones in there for various uses. Probably a water butt type thing would be suitable if you want it to be circular. They have a few different ones outside I think.

fitting sizes changed to 40mm as advised flowrate is a tricky one. At first one 600lph pump will power it but then the flowrate when i add a new pump will be around 2000lph. but will regulate this if 40mm outlet wont take it.

drop will be about 50cm.

Thanks,

Daniel

How much do their water butts sell for and how big are they?

Thanks,

Daniel

As for the air sucking into the pipe thing would you suggest fixing a 90 degree elbo onto the tank connector on the inner side of the filter pointing down into the water with a small length of pipe on so the pipe is under water?

Does that make sense?

Thanks,

Daniel