Kolto Kolto was a liquid known for its healing abilities . It was found in the water of the oceanic planet Manaan , with a significant concentration near the Hrakert Rift along with other underwater chasms . It was considered a valuable commodity during the Jedi Civil War , but its significance was lost over time , being replaced in favor of bacta . During the Galactic Civil War , the effectiveness of kolto was considered to be less than bacta . History . Kolto was a liquid that could only be found naturally on depths of the oceanic planet Manaan , and it was known for its healing capabilities . Both the Sith and the Jedi had an equally limited supply of kolto during the Jedi Civil War , and so they sought a way to get more of it to gain an advantage , but all attempts to synthesize kolto failed . In turn , it became a vital export for the economy of Manaan and for the Selkath species that controlled the planet . The Hrakert Rift was considered a prime location for kolto harvesting during the Jedi Civil War , being home to a giant firaxan shark known as the Progenitor , which may have been guarding the kolto . According to Selkath legend , kolto was also produced by the Progenitor . However , the scientists Kono Nolan and Sami believed that the shark had reached its large size and thus old age because it was feeding on the kolto . During the Jedi Civil War , the Selkath remained neutral ; neither favoring the Jedi and the Galactic Republic nor the Sith Empire . As a result , both governments set up " equal " operations on Manaan . In desperation for the healing power of kolto and to get an advantage over the Sith , Republic emissaries crafted a deal with several key members of the Selkath government . Fearing that the Sith would destroy the Selkath society , these leaders allowed the Republic to construct a secret underwater facility in the Rift to harvest kolto . During the time between the Jedi Civil War and the Galactic Civil War , the production of kolto suffered substantially and the value escalated . With the cost of kolto so high , the market for it collapsed in favor of a less expensive alternative : bacta . The reason for the sharp decline of kolto production is unknown and was hotly contested in academic circles . Nevertheless , the economy of Manaan collapsed and kolto became almost completely forgotten . With the onset of the Galactic Civil War , bacta had become the primary healing agent used in medicine . Aware of kolto ' s presence on Manaan and historical significance , Emperor Palpatine invaded Manaan and enslaved the native Selkath . The Galactic Empire exploited the Selkath and possibly their kolto resources . While kolto was still being used during the Galactic Civil War , it did not possess great value . It appeared to be less effective than bacta , but was used as a cheaper alternative . In their research , however , some historians noted that kolto may have been more effective in the past . By 1 ABY , kolto was in use aboard the Imperial prison barge " Purge " , where it was administered to some medical patients . Usage . Kolto was most commonly applied through complete submersion in a kolto tank . Patients would remain inside the tank , completely submerged in a solution of kolto , until their wounds were healed . During its peak , kolto tanks were aboard Republic starships , inside government buildings and in medical facilities . The concentration of kolto could be tailored to the patient , allowing the input of different solutions . Kolto was also one of the primary components of medpacs during the Jedi Civil War . Medpacs contained small amounts of the liquid for easy carriage and transport . Therefore , the amount of kolto was usually not substantial , so medpacs functioned primarily as first aid supplements . During the Cold War , both the frequency of kolto usage and the diversity of delivery methods expanded , particularly among the elite ranks of the Republic and Sith Empire . While regular troops and civilians on both sides relied regularly on standard kolto tanks and medpacs , Imperial Agent Operatives delivered kolto injections via wrist - mounted dart launchers or hovering medical probes in support of their comrades . Even the likes of Bounty hunters modified their missiles to saturate small areas with revitalizing kolto mist . Both factions also explored alternatives and supplements to kolto , including using narcotics such as Spice in place of painkillers . Behind the scenes . Kolto first appeared in " " , a video game released by BioWare during the summer of 2003 . In the game , the player is given a choice of two possible outcomes : player can pressurize the fuel tanks to four million sangens , resulting in detonation of the fuel supply , which destroys the internal mechanisms and appeases the Progenitor ; kolto production would then resume . As a non - canon option , player can kill the Progenitor , which results in the cessation of kolto production ( the poison that kills the Progenitor also corrupts the kolto , turning it black ) , spikes in kolto prices , and the banning of Revan permanently from Manaan . Both kolto and Manaan itself also appear in " " , where infantry units can get a healing bonus due to the presence of kolto . Kolto , however , is not mentioned anywhere else after the Old Republic era , not having been conceived before " Knights of the Old Republic " . Comments from " " support the theory that kolto was an inferior healing agent to bacta . It mentions that miners who couldn ' t afford bacta used kolto as a cheaper alternative . This could be circumstantial , however , as kolto may have already lost its economic significance in the Galactic economy . Kolto is used frequently in " " , the MMORPG released by BioWare in December of 2011 . It is utilized by all of the non - Force - using player character classes that have access to healing - type abilities .