01-28-2014, 02:20 PM
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those bad pockets of aenerobic sand are... i seriously don't know why people freak about them
if you have them, if it develops H2S, fine, just leave it, it's not going to go anywhere, and slowly diffusing into the water column will neutralize and gas off
if you are one of those people who messes with the substrate on a (ir)regular basis, then ya, you are going to cause problems, and your fish are going to suffer for it.
if you have plants, the plants will ensure there is enough oxygen around the roots that no aeneroxic areas will develop (in areas with roots)