deep sand or not

[yourmylunch]

why is it in my salt water aquarium it is ok to have a deep sand bed to remove nitrates where in my fw aquarium everyone says not so it will prevent anaerobic activity. what is the big difference?

 

[guppy]

Try this link about deep sand bed filtration
http://saltaquarium.about.com/library/blank/bldsbdiscussion.htm

 

[HarleyK]

Howdy,

I have 6'' of sand in my fw tank - no problem, thanks to my Malaysian Trumpet Snails.

HarleyK