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August 26, 2009
9:50 am
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Fishwife
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March 18, 2009
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I've ordered a Fluval U2 filter for my Arcadia Classica tank, I intend to keep the old filter running whilst the U2 cycles but how will I know when the U2 is mature enough for me to remove the old filter /huh.gif" style="vertical-align:middle" emoid=":huh:" border="0" alt="huh.gif" />

August 26, 2009
8:18 pm
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Eyrie
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QUOTE (Fishwife @ Aug 26 2009, 10:33 AM) < {POST_SNAPBACK}>
I've ordered a Fluval U2 filter for my Arcadia Classica tank, I intend to keep the old filter running whilst the U2 cycles but how will I know when the U2 is mature enough for me to remove the old filter /huh.gif" style="vertical-align:middle" emoid=":huh:" border="0" alt="huh.gif" />


I'd give it a month if you're running both together, and ideally reduce the flow each week in the old filter so that the new one is doing more and more of the work.

But if you can fit the existing filter media into the U2 then you'd be fine with just that on its own.

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August 27, 2009
8:20 pm
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Matt
Málaga, Spain
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How heavily-stocked is the tank?

Cake or death?
September 10, 2009
11:42 pm
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johnpeten
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August 31, 2009
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I have read the yards and yards of information on bacteria build up in filters etc. This is all new to me after a 40 year break from keeping tropical fish.
Everything in my tanks comes from the Lake. Gravel, rocks, plants and water. My tap water is untreated Lake water. Do I have to worry about biological buildup in my filters? I normally rinse the sponges when I change the cottonwool pads.

September 11, 2009
7:44 pm
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Eyrie
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The bacteria are needed to break down the ammonia produced by the fish to first nitrIte and then to nitrAte. This is then used by any plants present and can be removed by regular water changes.

As long as you rinse the filter media in old tank water and then only enough to avoid any obstruction to the flow it will be fine.

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September 11, 2009
10:47 pm
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johnpeten
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Thanks Eyrie. That is what we will do.

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