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Old 01-05-2004, 08:45 PM   #1
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Undergravel filters?

Hi all! Just wondering what the deal is with undergravel filters. I have a Rekord 60 tank which has a built in filter, but i've seen people here who have and undergravel filter as well as their regular filter. So, what is their purpose and how do they work and are they successful? Is it worth the extra plug?

Tar muchly!!



Jon
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Old 01-05-2004, 08:51 PM   #2
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I do not use, nor recommend an UGF. They are nitrate traps and ineffective.
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Old 01-05-2004, 08:57 PM   #3
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Ok, thanks.

So if they're inneffective why do people use them?
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Old 01-05-2004, 09:02 PM   #4
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It's an old fashion method. It was what people thought was best back in the day, and how I started. But all it does is traps waste materials. Notice in you LFS, they don't make an UGF that fits a bow front, which is a newer, but common style.
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Old 01-05-2004, 09:06 PM   #5
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Ok thanks bearfan, that answered that question and saved me a few £££!!

Thanks!

Jon.
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Old 01-05-2004, 09:15 PM   #6
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ugf are ok for smaller tanks and you don't get small bowfronts
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Old 01-05-2004, 09:51 PM   #7
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as are (to throw a bit more confusion in here) reverse flow UGFs. Where the water pumped out from under the gravel, instead of sucked through it.
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Old 01-06-2004, 04:09 AM   #8
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Time and time again i see people putting down the UGF, I agree they are not the best filter in the world but when it come on to the market many moons ago it was the latest in technology for the hobby. maybe in 25 yrs time the bio wheel that a lot of people are useing now will be called inaffective. Technology changes and things like the UGF will be called useless, but in it's it day it was the best.

I am going to stand back now and wait for the flack LOL.
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Old 01-06-2004, 05:08 AM   #9
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i agree well said
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Old 01-06-2004, 10:01 AM   #10
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This topic comes up from time to time, and I certainly used them faithfully years ago when you did not have a larger tank without a UGF. They work by drawing water through the gravel, which becomes a biofilter where bacteria reside and ammonia and nitrite are broken down to nitrate. There are many who still use them, and you will not see a larger fish store that does not carry them, new in the box. I don't like them because, as mentioned, they accumulate a lot of waste that at some point has to be dealt with, and I would prefer to skip that!
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