YSI pH (Phenol Red) Replacement Reagent

Reagent replacement packs for the 9300 and 9500 photometers.  Packs include reagents for 250 tests per pack unless noted differently.
 

The replacement packs include the reagents for 250 tests unless otherwise indicated.  Instructions are included with the starter kits - the replacement packs would be used after the starter kit is finished. Reagents can be used with either the 9300 or 9500 photometer.