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Old 02-25-2008, 21:06   #7
3kokosa2
 
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evo, ako znaš engleski možeš si sam napravit "primitivni" ph metar


http://www.funsci.com/fun3_en/acids/acids.htm#6
http://daphne.palomar.edu/ccarpenter.../msg01414.html
http://www.fishforums.com/forum/diy-...age-water.html

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