Filtration query

mike0605

Member
Nov 2, 2009
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Hoylake (Wirral)
Just got a new tank 30 inches long by 15 inches wide by 12 inches high. Purchased this to have a go at breeding my Compta/leopard frogs in a tank of their own. I have 3 wilds at the moment and plan on adding a couple more to the group before making the attempt to breed em.

I am planning on covering the sides and back of the tank.

And I am planning on a thin layer of sand with caves and bogwood as the only decor.

FILTRATION.

Something I saw a while back in a well known aquatic store sparked an idea.

whilst their tanks are on an automatic water change system they have sponge filters behind a corner of the tank which had been sectioned off and have pipe work releasing the water/air from the air driven sponge filter via a hold coming from the corner about half way up the tank.

Basically the way it works is water is drawn into the corner section from the tank at the surface it is then sucked into the sponge filter and returned at middle tank level. Does this act as a good biological filtration?

On my breeding tank I was thinking of doing this type of think in the two back corners of the tank to act as bio filtration and was planning on having one to two internal filters or maybe going for one internal and an external to act as large mechanical filtration.

Any advice on the benefits of non benefits of using these kind of corner filters and anything I could do better or should not do

Also, if the corner filters are a good idea how often should they be cleaned or is it as I though clean the mechanical internal filters as much as possible and never clean the corner bio filters unless they clog thus preventing water flow?

What I was thinking of doing was cycling all the filters in my existing mixed tank before putting water into the new tank then when filters are cycled was going to do a large water change on my 4 foot tank to set up the smaller breeding tank and obviously move the filters across.

Advice would be greatly appreciated.

Thanks
 

scatz

Retired Staff
Apr 8, 2009
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Devon, UK
I remember reading about the same method Mike, i think its big in Germany.
But for ease of use, i'd go with an external filter too
 

D-MAC

Member
Jul 24, 2009
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www.danditropicals.co.uk
Genaral rule of thumb is go for one that will do double the volume of your tank.With that in mind, a Eheim Ecco pro 300 will fit the bill perfectly and it only uses 8watts of power.
It also comes with all the media you will require.
 

dw1305

Global Moderators
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May 5, 2009
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Hi all,
Yes Bigbird is right, they are "Hamburg Matten Filters" and very popular in continental Europe. Personally I really like them, and I'd recommend them.

An option is to have an HMF and an external. I do this, using a 2nd hand Eheim, usually a 2213 Classic and a sponge (usually powered by a power head, but there is nothing wrong with air powered, I just had lots of power-heads from a hydroponics exp.).

You might like these links as well, "Brian's Tropicals" an American fish and frog breeder who uses HMF's <http://www.brianstropicals.com/news/25/L183!!.html> (he is a University Professor in his spare time), and another Academic and friend of Brian - Stephan Tanner of "Swiss Tropicals" <http://www.swisstropicals.com/Poret%20Filter%20Foam.html>

For the filtration questions have a look here: <http://www.plecoplanet.com/forum/showthread.php?t=8216> and at teh links included in my post.

cheers Darrel
 

bigbird

Pleco Profiles Moderator - RIP FRIEND
Sep 9, 2010
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Sydney, AUSTRALIA
Hi Darrel,

Just a question, how often would one have to clean the mat ?
In theory as you stated, behind this mat, i could have the external cannister intake, in the cannister inself remove the filter mesh and just have ceramic material ? cheers jk :thumbup:
 

dw1305

Global Moderators
Staff member
May 5, 2009
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Wiltshire nr. Bath, UK
Hi all,
Hi JK, you only need to clean the filter mat when the water level behind the mat falls considerably lower than the tank water. This will depend on the bioload and the breadth & coarseness of the sponge, but even with a really heavy bioload wouldn't be more than once a month, and with a lighter bioload probably every 6 months or so. If you had the canister intake behind the filter mat you could dispense with the intake sponge, I never have any sponge in the external, just ceramic rings. I like an intake sponge for ease of cleaning, as I want to make sure that the ammonia ends up in the filter, but not all mulm and crud.

When I had the HMF running (they weren't on fish tanks as such but in the waste water re-mediation lab.) I tended to take the filer mat out and give it a good rinse (in tap water) but not squeeze it at all. I then put it back in the other way around (so back to front), and then run the external (it wasn't an external then it was a pump and over-tank trickle filter, but the same theory applies) with the filter sponge off for a few days. I then cleaned the "external" and put the intake sponge back on.

The thing you always need to remember is people like external filters because they are quiet and relatively maintenance free, but they aren't necessarily the best option in terms of filtration, particularly for a heavy bioload.

cheers Darrel