Share 'Bio-Char or Char Coal as a 4" layer in Grow Bed'
I am planning for a 1ft grow bed and to fill with rock gravels.
In order to reduce weight, in the middle level, I propose to fill with Bio-Char (Char Coal)
small lumps mingled with coal in powder form. This is available in plenty in my area
and quiet cheap.
Is this a good idea? and will it properly filter the fine particles of fish waste?
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