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Pros Cons Of A Fluidised Bed Filter ?
January 5, 2011
10:19 am
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Nikhil
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December 6, 2010
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Hello everyone,

I am looking at these as a possibility to aid the biological filtration in the cement tanks at my farm. The bio load will be high in each tank but not too much.

I was wondering if anyone here has used or is using them and if they can provide me with exact details of the good and the bad. It will be really helpful.

Thanks

January 5, 2011
2:04 pm
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Colin
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January 27, 2012
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I have used and still have (but not in use) a TMC fluidised filter... http://www.tmc-ltd.co.uk/comme.....d-sand.asp

They have a great surface area for bacteria housing and when working it was a great filter. Two main problems are balancing the ratio for water flow and sand amount. Too much flow pushes all the sand out and too little doesnt let it flow enough (you need a big pump). Also, you need a bloody good prefilter to prevent ANY solid waste getting into the sand, so it doesnt clog.

I think you would be cheaper going for big trickle towers as you can fill it with anything that will house bacteria and not affect water quality.

Lastly, both filters have been called nitrate factories as they are so efficient at converting ammonia to nitrite then nitrate

January 5, 2011
6:31 pm
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Bully
South Wales
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July 12, 2009
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Have you seen the Kaldnes fluidised media? It may be a better option than fluidised sand. I don't have experience with either option, but a local fish store that relocated has setup all it's new freshwater systems using Kaldnes. It's a popular choice with Koi ponds it seems.

Here's a link to a typical type of filter where it's used:

http://www.youtube.com/watch?v....._NaRts5ZJU...07&index=37

You don't need the fancy filter though, as long as you have a large vat and can keep flow going through it. I think it's important to keep it oxygenated too, so an airpump may be required.

January 6, 2011
6:27 am
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Nikhil
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Forum Posts: 91
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December 6, 2010
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Hi Guys,

Thanks to the both of you. I have decided to go with the wet dry filtration as it is less of a hassle even when their is a power outage.

Now that brings me to the next question. Do you know for how many litres of water how much of filter media is required? I am planning on picking these blue 150ltr buckets which have a lid on them, making 2 holes at the top one for air exchange and the other for water inlet, have a shower or a water sprinkler used in agriculture/lawns and have it spray that over 2 layers one each of fine and coarse sponge and then have bio balls after that procured from these guys http://www.fujinospirals.com/f.....atures.htm then have a perforated tray at the bottom about 3" above the base of the tub and then have one water outlet from the bottom. This will hand on at the edge of each pond. One simple pump with a prefilter attached to it for mechanical filtration.

Let me know what you think of this.

Regards

January 6, 2011
10:50 am
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Colin
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January 27, 2012
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Fine, but remember that the water at the end of the process has had a lot of its oxygen removed by the aerobic bacteria so is ideally aerated heavily before going back to the tank/pond.... you might also want to have baffles in the bioballs to redirect water away from the edge of the container as water can often just run down the sides and out rather than through the balls

cheers

January 6, 2011
7:24 pm
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JazzBora150
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December 21, 2010
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i used both on my koi pond and found kaldness k1 the better option (static) i also used a nexus filter which was k1

my water was gin clear and all parameters were safe even while in summer feeding up to 8 times a day with 25 koi in a 2000 gallon pond

i was actually going to try and use it in a second filter i have for my tank as the surface area of this media is staggering but im unsure if i should run both pumps in the 2 filters or just let 1 pump run as its already more than ample for my tank

but kaldness does wear if you aerate it but that is a long process and its relatively cheap on ebay to replace

also yo ucould try adding the natrix o
this promotes plankton growth in the filter another benefit as they colonise the little squares and dont get flushed away during cleaning

hope this helps

January 8, 2011
3:22 am
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Nikhil
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Forum Posts: 91
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December 6, 2010
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Colin I will keep that in mind and incorporate that in to the filter.

JazzBora150 thanks a lot. That media has an insane surface area its almost more than double of the one I was planning to use. I will just have to check now on its availability in India.

Thanks

January 10, 2011
2:02 am
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JazzBora150
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Forum Posts: 195
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December 21, 2010
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you should check out ebay there are copies of kaldness k1 and you should also try to get bio chips

ive added photos

if you get it

it has a waxy coating on it which is best removed to do this soak it in a potassium permanganate solution

make it quite strong and soak it untill it sinks

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