E' provato, con tests fatti scientificamente, che l'assorbimento di ammoniaca in acqua salata da parte della zeolite usata per acquari marini (clinoptilolite) è irrilevante.
Questo, per esempio è una comparazione fatta fra la zeolite ed il carbone attivo:
http://www.worldfishcenter.org/naga/...uabyte%204.pdf
Conditioned activated carbon was compared with zeolite (clinoptilolite) at different salinities, Total Ammonia
Nitrogen (TAN) and times. The dosages of both materials were the same ie. 10 ppt. Different salinities from 0 to 30
ppt were prepared in 24 three-liter plastic buckets. One, 3 and 5 ppm TAN were added to the buckets. TAN absorption
trend was monitored every 4 hours over 24 hours. It was clear that over time, removed TAN decreased for both
materials. No change was observed in the buckets containing zeolite, after 8 hours. A similar trend was observed for
activated carbon, but, despite the decreasing rate of absorption by activated carbon, ammonia (TAN) absorption by
both materials decreased.
The largest difference between these two materials was observed at 0 ppt salinity and
difference was not significant at 30 ppt salinity. After 24 hours, concentration of TAN in buckets containing 1, 3 and
5 ppm TAN decreased by 80.8%, 65.4% and 58.8%, respectively.
At the conclusion of the study, a significant difference was observed between zeolite and activated carbon
and the results obtained by zeolite were found to be more satisfactory than activated carbon.
un interessante thread sul forum inglese:
http://www.ultimatereef.net/forums/s...d.php?t=267358
di particolare interesse gli interventi di Gary White che oltre che essere un acquariofilo è un eminente professore bio-chimico statunitense.