look up on Bio filtration![]()

My Eheim professional 2222 contain ceramic rings and another like rocks. What are ceramic rings and the "rocks" used for?


look up on Bio filtration![]()
"In war, whichever side may call itself the victor, there are not winners, but all are losers."
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The ceramic rings help to spread out the water flow and trap large debris by creating eddys. The "rocks" are sintered glass... a media for beneficial bacteria to colonise. As suggested above, read up bio-filtration on the web for more info. www.thekrib.com is a good place to start.
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