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Old 03-10-2014, 08:08 PM   #11
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So Mebbid: are you saying that a regular HOB filter like Aquaclear 110 or Marineland 350 is good enough for a 90g tank for example? No need for an Eheim 2217 or any other canister filter?. I thought the more filtration the better the water quality and less problems with water parameters. I'm no expert on this but people are allways saying that overkill fintration will keep your tank cristal clear and trouble free. I see people with a 110g tank and a Fluval FX5 rated foe 400+ gallons or an Eheim 2262 (rated x 460g) in a 150g tank.

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Old 03-10-2014, 08:17 PM   #12
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Point^ good question
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Old 03-10-2014, 08:24 PM   #13
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Sorry , it is not a secret that some aquariumists are obsessed with filtration
more will not hurt of course , but question of just how much is Really required is a very valid one. Something tells me that FX5 is a terrible overkill for anything under 100gal.
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Old 03-10-2014, 08:34 PM   #14
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Alota money for it!
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Old 03-10-2014, 08:54 PM   #15
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THE amount of bb in a filter isn't the issue if it's cycled correctly. The main need for larger filters on a larger tank is water flow.
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Old 03-10-2014, 10:40 PM   #16
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Quote:
Originally Posted by Mebbid View Post
When I see threads like this I have to pose this question:

What good does an excessive amount of biological filtration media do?

Your tank can only hold soo much fish stock which is a direct limiting factor in the amount of ammonia that can be produced at any given time. That ammonia production is kept in check by a bacterial colony that is limited in growth by the amount of ammonia in a tank.

Assuming the average tank is producing 20ppm nitrate weekly which is fairly average for an aquarium. Each 1ppm of ammonia creates 3.6ppm of nitrate. This will mean there is approximately a 5.5ppm production of ammonia every week. A standard HOB filter with a cartridge insert is often cycled at 4ppm of ammonia daily which is 5x the amount of ammonia produced in a week on an average tank.

There's no need to go overkill on filtration and this is the exact reason I haven't done a fluidized sand bed filter.


I had similar the other day but did my usual and just deleted it moved on.
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