stang1
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Thanks Ben and sorry for hijacking the thread Mark!only a nitrate factory if you let them get clogged up. Need more maintainance than in FW tanks as there is more gunk in marine.
If you use live rock as your main source of filteration then theres nothing wrong with scrubbing or replacing the media weekly or how often you need to
I'd never heard of this before and was curious. We did have plenty of live rock, skimmer and two powerheads in ours and readings were always good. The same goes for the marine display tank we have at work.
I suppose that was another factor, we always did regular maintenance on the tank.the thing is the bacteria on live rock are capable of converting nitrates to nitrogen, but in an external the ceramic media or what ever you use (excluding rubble) will not do this and will leave nitrates as the waste product, and the number 1 cause of algae is nitrates and in high concentrations can harm inverts especilly when not regularly maintainedI'm surprised about an external being a "nitrate" factory as I ran one on my marine tank with no problems. We never used live rock rubble but nitrates were minimal?!