Ideas for Carrying and xfer of water to fresh tank

Bilge pumpThis is similar to what I use for mine. I can only put water in through the hose spigot. I set up a quick disconnect for the 12volts. I just drop the pump into the bucket hook up the short hose and takes a couple of minutes per bucket load.
Even though it's a clean setup. we always have a separate 5 gallon jug for drinking water.