[OGD] Sterilization

[Carlos Antonio Akselrud de Gouveia]

I would like to clarifie my suggestion of using Na3PO4. It is usefull to 
sterilize TOOLs, if you read in my statment, not clay pots. It is easy 
to handle, stable and less corrosive than others option. Phosphates are 
salts, with diffeent chemicals properties, you have mono, di and 
triphosphate, being the last one strongly alkaline. If you use amonium 
phosphate or sodium phophate you will achieve different pH. If someone 
believe that phosphate found in fertilizer is the same I recomended, 
maybe is better forget it.

Chlorine or muriatic acid are fine, but you maust be carefull in 
handling them.

If you want to reuse clay pots, the best is "burn" them. 500 F will 
sterilize, 900 will calcine (the organic deposits wil be black) organic 
material and 1100 will burn carbon, with realy new pots at the end. If 
you have a furnace (in my job we have), go ahead.

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