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Substrate



I have decided to make a substrate of  the following for an 80 gal tank:
from bottom up:
1.  1" layer of potting soil
2.   Layer of  Red Art Clay
3.   3" #3 gravel.

    If anyone has any experience with potting soil or Red Art Clay, please
criticize, suggest, correct, or say whatever you wish.
Is the Red Art Clay a good substitute for laterite?
Should the clay be mixed together with the potting soil, or is it better as a
separate layer?

All help appreciated; e-mail or post  on  NG

Harold
HPach at aol_com