Compost Tumbler How To Use: Compost Well Tumbler Procedure Step 1. Add wet waste into the tumbler one of compost unit. Step 2. Add 15 to 20 % saw dust to maintain the Moisture level and C/N ratio. Step 3. Add Compost Well Supreme Culture into the same barrel in the ratio of 1%. Step 4. Rotate tumbler 3 – 4 times until ingredients mixes well. Step.5. Once tumbler one is full same procedure start with tumbler two.