Namenjene so za spremljanje pH vrednosti bazenske vode, uporabljajo se skupaj s Pool testerjem. Pakirane so v tablicah po 10 tablet.
NAVODILO ZA UPORABO
V levi prekat Pool testerja, napolnjenega z bazensko vodo, vstavimo Phenol red tabletko za določanje pH vrednosti vode. Tester tesno zapremo in ga lahno obračamo naprej, nazaj ali stresamo, da se tableta raztopi. Raztopina v prekatu se obarva, razvito barvo pri dnevni svetlobi primerjamo z barvo na barvni lestvici testerja in tako odčitamo pH vrednost.
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