The SpectraPure Ultra-Precise Level Controller holds your tank??s salinity constant while adding calcium or other nutrients in small doses. The UPLCT has a precise control within 0.50". The pump used in the UPLCT is the same pump that is in the LiterMeter III, the leader in aquatic dosing for over 10 years.Comes with long life peristaltic tubingEasy to position pump head in all four directionsQuiet and reliable peristaltic pump ever madeThe highest lift of any top-off system. Can pump liquids with over 50 ft of lift.No Back-Flow Problems. Intrinsic check valve operation to prevent accidental back flowBack-Up Fail Safe. Comes with separate back-up overflow protection switchUltra Reliable Level Detector. Precise control within .050".5 Year Limited WarrantyIncludes the peristaltic pump tubing