Hi reefers, letting go this toy because it is quite noisy. I have used all the pumps A to D. Recently changed the piping for water out, alkalinity in and out. Will bundle in 2 x dosing containers each 450ml, which I used for reagent and alkalinity. Will bundle in a pair of brand new pinpoint pH calibration liquids for 7 and 4. All accessories of the small and large measuring cylinders included. Selling at 650. Collection at my place 640441. The machine is not being used now and the pH probe is protected with a bag of water. Interested parties pls pm. Sent from my iPhone using Tapatalk