Yep my system works just like that it's a 25-30ltr barrel with a Lid top. You'll get from any local Chinese restaurant has it's what things like chutney come in.
Then just use distilled water, I used distilled water, with approx 70/30 antifreeze mix. Just make sure the pump has decent head height, around 2mtr will do. Doesn't need to be high flow rate has they hardly get hot and don't need massive flow or pressure.