I have a dedicated drain pump in my sump permanently connected to a long hose. The pump is connected to an x10 module for remote control.
In the garage is the RO/DI storage above a 32 gallon brute container for salt water mixing/storage. In the brute is a heater, power head, and a dedicated pump connected to long hose to run the fresh saltwater back to the sump. This pump is also connected to an x10 module.
Water changes involves uncoiling both hoses, drain hose goes to the toilet across the hall. Pumps are turned on as needed with an x10 remote control.