Your only feasible choice for using the Eheim canister on a reef tank would be to fill it with live rock rubble and/or chemical filtration media of some sort like carbon or GFO.
Personally, I think having a big expensive Eheim canister to do these tasks is a big waste. With enough live rock in the tank, any in the filter would add very little filtration capacity. Further, a reef is all about flow and canister filters don't do a very good job of that compared to even inexpensive propellor driven powerheads like Hydor Korallias. Lastly, a $40 Phosban media reactor would get more out of chemical media than having sit in a bag in a canister filter.
I'd sell the Eheim and invest that money some proper reef equipment.
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11-25-2008, 04:09 AM
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