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- More than 10 years
As I have mentioned earlier, very unlikely such process will take place unless have Deep Sand Bed and/or tank has been really neglected. And from reading members postings, I doubtful of such mishap, actually I was telling myself that some may be doing to much maintenance on the tank, lol!sirdarksol said:Trying to achieve a perfect balance of anaerobic zones in the substrate is pretty much impossible. There will end up being either too many toxins in the tank or the anaerobic zones won't build enough to begin using nitrates. Either way, they're not something I would rely on, which is why all of my tanks are constantly stirred by Malaysian trumpet snails.
Anyone with deep sand bed, look from under the tank w/ flash light, which can be easily observed (Dark/Black Patches)when not properly maintained.
When such Dead Zones are noticed, simple GENTLE Vacumming will disturbed the DEAD ZONE and removes possible Toxic GAS. Can check for possible odor in bucket .
Having fish/snail which will constantly disturbed the substrate will definitely help you in keeping substrate in AEROBIC CONDITION as I am using CLAMS in S/W to do the same and also filters the water.
No intention of scaring anyone as well maitained tank will avoid such mishaps.