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Arcar View Drop Down
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Joined: May 06 2004
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Points: 174 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Arcar Quote  Post ReplyReply Direct Link To This Post Topic: Undergravel filter
    Posted: May 26 2004 at 9:28am

I have a 40g High, Im trying to make this tank a reef tank and i have an Under gravel filterWith power head on top for flow. Will this be ok with my reef tank? I really dont want to take it out b/c i have a lot of live rock and will shock my fish... What can i do and is this ok? I get so many answer I hope this is the right one! Thanks

P.S I have a Protean Skimmer,Wet/Dry Filter,heater,Right lights but they move my temp around and that's it!
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Jake Pehrson View Drop Down
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Points: 4279 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jake Pehrson Quote  Post ReplyReply Direct Link To This Post Posted: May 26 2004 at 9:47am

Are you having any problems with Nitrates?  With an ug filter and a wet/dry I suspect you are, but if not there is no reason to change it IMO.
Jake Pehrson

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coralplanet.com

:)
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Mark Peterson View Drop Down
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Points: 21436 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark Peterson Quote  Post ReplyReply Direct Link To This Post Posted: May 26 2004 at 10:04am
Using an undergravel filter (UGF) is how I started my first saltwater aquarium in 1993. Then, in 1995 an article came out which talked of Plenums. I switched over immediately and have been experimenting with better methods of filtration ever since.

Though it is not the best method of filtration, in my opinion, a UGF can be left in the tank as a plenum. But the plenum area needs to be protected. What I mean by this is, to be sure that it is always kept covered with substrate. The uplift tubes should be removed and substrate allowed to fall down the hole.

If at some future time a pesky fish digs a hole down to the top of the UGF, the plenum is ruined and a load of organic nitrogen gets released which causes an algae bloom.

For more info, search this board for "plenum".

What are the "right lights" and what measure of temp fluctuation do they create?

What all do you have in the tank now?

What is the substrate and how deep is it?
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