An advantage to purchasing the 3% solutions and diluting to 0.8% daily ... avoid contaminating the primary source of screening cells. Our usage was so close to using up a set of 0.8% reagents each month we ran the risk of running out of reagent cells before the next standing order shipment arrived. We also had some contamination issues of the primary bottles of reagent. Switching to the 3% solutions allowed us the breathing room we needed, provides a ready 3% solution for our tube backup method, and allows the primary reagent vials to be placed back into the refrigerator instead of remaining on the bench for extended periods. If the daily suspension becomes suspect, pitch it and dilute a fresh set, perform QC, and continue. Many advantages to starting with a 3% solution for our facility.