Proterra
A very porous growing media created with long-fibered
Canadian sphagnum
peat moss including
large peat chunks and
coarse perlite. Fortified
with a well balanced
charge of macro and
micro nutrients, it
includes a wetting
agent and is pH
balanced with dolomitic
and calcitic limestone.
Specially designed
and developed for
high aeration with less
weight. Because of its
porosity, ProTerra HDM
is highly resistant to the
formation of algae.
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Sounds like Prom-mix BX but you would also need to look at % and nutrient content N-P-K if it has little to no charge than it is basically promix. I would look at perolite % and price
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