Use old water or start fresh? - Canreef Aquatics Bulletin Board

#16

09-21-2011, 03:12 AM

Myka

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Join Date: Mar 2004

Location: Saskatoon, SK.

Posts: 11,268

The risk in moving a sandbed is hydrogen sulfide from anaerobic areas. These look like black patches in the sand and stink. Release of Hydrogen sulfide will kill fish and inverts - and humans too if the concentration is high enough (shouldn't happen in a tank...not hobbyist size anyway).

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~ Mindy

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