Plastic Ornaments and Bad Odors

["Jack Meltzer" <jack_meltzer at hotmail_com>]

Has anyone else experienced a problem with hollow plastic aquarium ornaments 
such as caves and fake driftwood?  In short, whenever I place one of these 
objects in my tank, it invariably, over time, begins to generate a foul 
odor.  My best guess is that gasses become trapped inside the object and 
begin to react with the plastic generating a strong chemical smell.  As a 
result, I no longer use hollow, synthetic materials.  Does anyone have any 
theories?  Thanks.

Jack

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