Idk if anyone has mentioned it. I use the nutri-sea water containers you buy pre-mixed salt water in. See-thru, large lid to refill, and hold almost 5g. I use triton elementz so being able to fit 18 liters of element in the container is a big plus. The cover is actually large enough to fit a small powerhead into to mix up your dosing concentration. I actually took the time to pour liter by liter into the containers and mark with a sharpie each liter so now I can just pump in the exact liters I need when I fill them up.