I used to pour from a small bucket and found it to be a mess.
Since I don't have a sump my process has made my weekly chore much more rewarding.
I start by mixing salt in a 5 gal
bucket of RO
. I have a Rio power head I place in the bucket along with a small heater. 24 hours of mixing seems to do well.
I remove heater and attach a hose with a 90 degree fitting to the Rio.
After I vacuum my rock and sand as I collect my water, the only thing left to do is turn the Rio power head back on and watch the tank fill back up.
I do this weekly and find that splitting the chore into 2 days has made it much more pleasant.