Backyard Aquaponics
A place to discuss aquaponics

Has anyone hear have any know how about screen filter

Get a mesh made from 316 stainless steel, install this at an angle in a plastic box, trickle your water in from the top of the mesh. Simple, pricy to get fine mesh, and requires daily maintenance.

I like the look of this one.
but i went with a RFF because it was easier to make and i needed outlet up top.

http://www.youtube.com/watch?v=IH6K7n6M ... =endscreen

If you were handy and worked with fibreglass I would base your design around

the Cetus Sieve

It would be relatively easy to make, it can sieve 1800 litres/hour and is easy to clean.


It uses a 300 micron screen which should be around $100 ? for an offcut if you are lucky.

here are the links:


http://www.inmotionaquatics.com/Cetus-S ... -sc-8.html


http://www.inmotionaquatics.com/pdf/Cetus_Manual.pdf

cheers Lou

I'm in the process of making one for my system. Cetus make replacement wedge wire screens in 300, 200 & 100 microns which sell for $350. The actual complete sieve filter with standard 300 micron screen sells for around the $1,250 mark and can handle 18,000L/hr.

One problem incorporating it into my system is the required 500mm fall. I plan on building mine so that it sits above my fish tank in the center. It will be supplied with a greater flow than what enters/exits the tank with the excess water overflowing back into the fish tank after passing through the screen. I haven't decided if I'll use multiple air lift pumps or a 2nd pump to lift the 10,000L/hr up to the filter.

I have a spare sheet of 3mm aluminium in the shed which I intend using for the housing. Once I've welded it all up and hit it with a flapper disc I'll coat it with a pond sealant. Hopefully I'll get started on this in another months time.

The reason I want this type of filter is because my system runs unattended for two weeks with a high fish stocking density and I want to remove the solids out of it. Where swirls and the like collect them and the solids remain in the system until they are released. I will be feeding more than 2kg a day later on this year so you can imagine the amount of waste.

Cheers Muz

Cool thanks for the help dose anybody know anything about rotating drum filter and if I could make one I like the idea they they take the waste straight out of the system instead of filtering it and staying in the water flow creating a tea beg affect after some time like most mechinacal filters

These would be good

the pic is from a fish farm with 1000 fish in 10000 l of water and that is the amount of poo after one feed


And I would love a rotary drum filter

Wait here is the other pic

Wow, this new generation really love their filters...

What u mean

Recently a lot of people have been bringing up and using extra filtration than just the media beds like swirl filters, radial flow filters, screen filters like this one, etc.

Which, to be clear, are unnecessary in AP, and simply provide certain maintenance conveniences. Some argue that an integral part of AP success is to allow excess solids to deposit in the growbed to be broken down by worms, or mineralized, releasing all types on trace elements and other goodies. Many people remove the solids simply to provide more freedom on its distribution and use.

It is not recommended to use solids removal as a way to increase fish stocking density over sufficient media bed filtration. Increased stocking ability from additional BIO filtration on the other hand is more easily quantifiable, and should probably be favored over manual filtration if space is limited.

drluc do you suggest yabbies or mussels as extra filtration or will they make it worse

The solids dont dissappear? Some of it is broken down and altered but much remains as silt like stuff in the growbed. So long as we are adding feed there is plenty of stuff there which wont go away.
Leave it long enough and the grow bed wont work as it is supposed to having anerobic areas.
Using filters slows the clogging up. Cleaning blocked grobeds out is something you will want do just once.

I agree that using filters to increase stocking levels is floored however they are a tool to maintain stocking levels over time