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Kitty Litter Revisited
As an aside to the great Kitty Litter Controversy for the past two years we
have been working with a potting media/soil amendment called Profile. This
material, like many "kitty litters" is a fired clay. However, Profile goes
under a more rigerous firing process. The attributes of this material are
that it has some cation exchange capacity, contains some plant nutrients
(e.g., calcium) and has been shown to retain its positive physical attributes
for several years in terrestrial conditions (I'm not sure if the tests were
performed in soil or as a potting media). It's also more attractive than
kitty litter (i.e., colored other than grey). For those of you who are
considering a kitty litter substrate, this medium may be a better choice.