Qwikshot® (QT2501) Is the industry's only refrigerant & oil acid treatment that doesn't leave residue. Unlike acid neutralizers that leave a salt-based residue from a chemical reaction, Qwikshot® chemically attaches to acid and/or moisture molecules and flushes them to the filter drier. QwikShot® Acid Flush was developed to solve the problem of treating acid without leaving disruptive residues. One bottle treats up to a 6-ton HVAC/R system and removes up to 26 drops of moisture. Other neutralization acid treatment must leave a residue of some kind and residues can cause problems. Instead of neutralizing, QwikShot® quickly flushes and harmful acids into the filter drier of an operating system.