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Originariamente inviata da stefano66
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Originariamente inviata da qbacce
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o sottoforma di organico..
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detto terra terra ........ solo il po4 utile -28d#
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beh, attenzione, dice:
The phosphate present in the skimmate could not come from inorganic phosphate in the water column; that ion would have been removed by the thorough washing with water. It is possible that some of this phosphate is in the form of insoluble calcium phosphate, but that occurrence would be unlikely as Ca3(PO4)2 is formed at rather high pH, which is not characteristic of the skimmate liquid (pH = 7.67, see below). By default, then, it is most likely derived from organic phosphate; that is, many biochemicals within diatoms and all other living organisms (coccolithophores, foraminifera, bacteria, humans, etc) have attached phosphate groups. Aquarium organisms recruit these phosphate molecules from the inorganic phosphate in the water column and then attach them to the organic biochemicals. Thus, they effectively concentrate phosphate from the water, and that phosphate is then removed (within the intact organism) upon skimming. From this perspective, skimming does contribute to the removal of inorganic phosphate from aquarium water.
certo che è strano l'alto valore di Ca rimosso, secondo me era il loro RC ...
comunque se siamo al 30% di asportazione, se è vero che come dicono delle migliaia di elementi solo una parte (per di più unknown) viene tirata via, non è poi così sorprendente che un dsb maturo possa essere gestito senza skimmer...