Neptune Systems Black Friday Sale begins Thanksgiving day when the clock strikes 12:01 AM and ends at 11:59 PM Sunday night. Participating dealers will offer Neptune Products at up to 10% off. Additionally Door Buster deals are available on the popular DŌS Dosing pumps and Magnetic Probe Racks (MPR). Normally you will find the DŌS dosing pumps selling for $349.95 but for a few days it will be available online and at participating retail stores for $296.96. Likewise, the MPR usually sells for $39.95 but you will be able to find in on sale as low as $29.65 until 11:59 PM on Sunday.