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>> I wrote:
>> The ADA substrate is 2 part: The bottom layer is
>> a pumice stone mixed in with peat called "PowerSand"
>> whose purpose is to regulate to some extent the pH. The
>> top layer is a baked clay called "AquaSoil" with neutral
>> effect on pH. Both substrances are quite porous, which
>> provide for good bacterial growth.
> James Purchase wrote:
> According to information which I received from Hideki Higuchi,
> who is with ADA in Japan, Aqua Soil does have an effect on both
> the Hardness of the water and on it's pH.
James, I too have heard ambiguous statements regards the composition
of the ADA substrate soils (and other products). But my most recent
comes from a recent issue of the Tropical Fish Hobbyist in which Mr. Amano
writes in a short article that Aqua Soil is in fact pH neutral.
christopher.coleman at worldnet_att.net