I haven’t used a bucket since my freshwater days 15 years ago. I currently have an AWC system running which pumps water through 1/4 inch RO tubing I fished through the ceiling to a mixing station and floor drain in my furnace room. Before that I just used a wheeled brute and a Maxijet 1200 with about 50 feet of 1/2 inch vinyl tubing so I could drain into the nearest sink. Occasionally I pull out the gravel vac and vacuum my sand into the filter sock in the sump to keep that clean, but all the water changing in my salt setups has always used pumps and hose/tubes.