05-21-2008, 02:38 PM
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Layered filtration with sandy substrate?
After multiple hours of searching, reading, thinking and such; I really like the idea of layered filtration combined with other filtration forms.
However, I have a 29g setup with a combined silica sand, flourite, and top soil substrate. Would it be possible, or has anyone run this style of filtration with sand? I would think that the upward flow would just create chanels of water flow instead of a smooth diffusion of water flow over the bed of sand.
I also plan to have some kuhlii loaches that like to burrow. Any chance that the upward flow created would bother them?