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Re: Large Rock = Anaerobic Substrate???

Well, a way to make certain is to move the gravel away from the intended 
site and set the rock on the tank bottom. Move the gravel back and you're 

I have to do this for cichlid tanks anyway, and it's just habit to do it in 
all situations. After all, I live in earthquake country and a falling rock 
could burst a tank. Burying it and putting its weight on the bottom of the 
tank reduces/eliminates that risk. And the bonus is no anaerobic compacted 
areas of gravel. 


From: Jerry Baker <jerrybaker at weirdness_com>
Subject: Large Rock = Anaerobic Substrate??? 

I have found a rather large rock that I would like to use in my 80G
tank, but I am worried that its large footprint will present some
problems in creating  anaerobic areas in the substrate. Is there a way
to avoid anaerobic areas underneath rock, will plants right next to the
rock root underneath, and is it really that much of a problem? The
footprint of the rock measures about 6" x 8" roughly, and it would be
set on top of the substrate and wiggled in a little bit for stability. 

 - --
Jerry Baker