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Old 09-03-2011, 09:11 PM   #1
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General Questions.

1: Whats the difference between using RO/DI water as opposed to adding those tap water fixers that supposedly remove the chlorine and all the harmful things?

2: Is there such thing as over filtration. For example if i put a Fluval 405 canister filter on a 50 gallon tank is that too much?
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Old 09-03-2011, 10:40 PM   #2
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Not positive on the first one. I believe ro/di removes all impurities from water such as iron which can be bad for a reef tank. Where as your dechlorinator just neutralizes the chlorine and heavy metals, it does not remove them from the water. (Someone correct me if I am wrong)

On the next one there is no such thing as over filtration. I am actually planning on using the fluval 405 on my 40 breeder tank. And I have 2 aquaclear 70s on my 36 gallon. So no worries. How do you like the 405?
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Old 09-03-2011, 11:06 PM   #3
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Quote:
Originally Posted by freppy16 View Post

1: Whats the difference between using RO/DI water as opposed to adding those tap water fixers that supposedly remove the chlorine and all the harmful things?

Your basically removing all dissolved minerals / buffers that are in the water.
If your trying to maintain a soft water tank ... RO/DI's the way to go if your tap is naturally hardwater. Problem with RO water is it's susceptible to pH swings since it lacks buffers that help stabilize pH.


2: Is there such thing as over filtration. For example if i put a Fluval 405 canister filter on a 50 gallon tank is that too much?

Yes and No ... One or even two Fluval 405's in a 50 gal is no big deal, but having say two FX5's in a 55 just becomes unnecessary. While you would have good 2 filters, you may not necessarily get any more effective filtration ... there's only so much BB that a tank's bio-load can support and adding more filters won't cause more BB to grow.
See the bold for answers
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