Tech performed service on (2) carrier split systems. As tech was performing service on upstairs unit, tech found auxiliary drain pan to be full of water. Tech fully cleaned/vacuumed drain line and installed algae tabs to help with drainage. Tech cleaned and vacuumed auxiliary drain pan and water is flowing outside. All ok at this time. Customer stated would like condensate pump for upstairs unit. Customer is interested in media filters but stated will install filters next visit. Customer also stated wanted tech to come back for future services. Delta t is within specification and customer is satisfied with todays visit. Found no other challenges at todays visit.