Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I add a pump, and the water can be ready in half an hour. With no pump I let it sit overnight.
Put the pump at the bottom, middle, and aim it vertically, so there is a column of water being directed up to the surface. At the surface it will sheet over to the sides, then down to mix with the rest of the water. While it is at the surface the excess gas will leave. Chlorine, too, if your water company uses chlorine. (Not chloramine). The larger the surface area, the faster the gas leaves.
Warmer water holds less gas, so if you can warm it, this will help, too. Good idea to warm it to aquarium temperature before adding it to the tank. I add an aquarium heater or else heat a small amount of water on the stove and pour it in. If I am only going to wait a short time. I will partially fill the container from the hot water tap.
I use the Rubbermaid Brute. I find that square or rectangular storage bins can bow outward, and eventually crack. I have trimmed the lid to make a sort of reinforcing frame around the rim, and this helps a lot.
Round storage containers seem OK with water, they cannot bow outward, at least.
The one you linked might be so long, and so prone to bowing outward that even a trimmed lid might not help. The box will pop out from under the rim of the lid. I would select something closer to round, if at all possible.