EB>        My original question was "Does anyone know what the ratio of Na
EB>( Sodium
EB>), Calcium and sulfer should be for pot.
       Didn't glean that from the original, but whatever.  Didnt mean to 
roust your ire, but to illustrate that *some* people equate aluminum with 
aluminum salts.  As for the rest;  a good hydroponics guide might have the 
data - I do not.  Most plants are fairly tolerant of a wide range of stuff in 
their growing media, and picking a neutral solution or substrate is a good 
starting point. (and will be dead wrong in some cases ;-) ).
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