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Old 09-21-2005, 12:05 AM   #1
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EhfiSubstrat or Sponge?

Hey Fellas,

Need some advice again. I now have 2 Aquaclear 70s running on 37G. I'm thinking of filling 2/3rds of both my Aquaclears with EhfiSubstrat (or any kind of Ceramic type media) sitting on top of 1 sponge. OR would it be better to have 2 sponges and then the ceramic rings instead? Thanks-in-advance.
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Old 09-21-2005, 12:09 AM   #2
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More ceramic rings would be better. They have a much larger surface for bacteria (biological filtration) than the sponges, since they are so porous!

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Old 09-21-2005, 07:41 AM   #3
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Sorry Tiffi but I must debate your answer. The physical characteristics of a sponge make it the most ideal colonization point for nitrifying bacteria. There is simply more surface area in a sponge and it's easier for water to flow through. In addition, they are easier to clean without harm to the colony.

A good tip is to use a sponge prefilter on the intake tube.
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Old 09-21-2005, 04:37 PM   #4
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I have to agree with Brian....I run all my ACs on 3 sponges or 2 plus a layer of biomedia.
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