The Planted Tank Forum - View Single Post - Brazilian Sword, true aquatic?
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post #16 of (permalink) Old 12-20-2008, 06:02 AM
Fresh Fish Freak
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Join Date: Feb 2008
Location: Tampa, Florida
Posts: 24,403
The problem with rock wool is that fish sometimes try to eat it, and it can kill them.

Also it can get tangled in a filter intake and clog/break the impeller.

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