Used Emperor 400 Question 

CBickings

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Hiya,

I got two used emperor 400 filters with my 135 gallon second-hand tank. Should I replace the used biowheels or replace them with new ones?
 

MikeRad89

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I don't even use the biowheels to be honest, I just take them off. It's a gimmick IMO.

If you do want to use them, definitely get some new ones - who knows what's living in second hand ones.
 
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CBickings

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Ok, thanks! I have been debating while I clean the filters and tank!
 
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