Canreef Aquatics Bulletin Board - what the heck is this?

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Canreef Aquatics Bulletin Board (http://www.canreef.com/vbulletin/index.php)

- Reef (http://www.canreef.com/vbulletin/forumdisplay.php?f=8)

- - what the heck is this? (http://www.canreef.com/vbulletin/showthread.php?t=73680)

StirCrazy

03-15-2011 11:13 PM

I used to have a bunch of thoes in the darker areas of my old tank. sponges are good filters and also a good indacator of tank health

Steve

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