Bio-Balls

bruce 1

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I was looking at a different post and read this
paul692;87253 wrote: i would take the bio-balls out of the sump they contribute to increased nitrates i have heard i took mine out no problems


Do the balls cause problems?

If so what should I use? Mine has them in it now.
 
They trap detritus and elevate nitrates if not cleaned regularly (and if you do clean them, you wipe out the biological filter).

Most people replace them with live rock rubble.
 
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