The 0.5 is a little thick, but may work... I've never mashed that thick so I don't know. Can you fit up to 2.0 qts./lb.? If so, you could do (give or take) 1.0, 1.5. and 2.0 qts./lb. At any rate, I'd max out what your tun can hold (up to 2.0 + qts./lb.) and work your way down.