diff --git a/js/buoyancy/model/BuoyancyLabModel.ts b/js/buoyancy/model/BuoyancyLabModel.ts
index b967fbeb..24448d92 100644
--- a/js/buoyancy/model/BuoyancyLabModel.ts
+++ b/js/buoyancy/model/BuoyancyLabModel.ts
@@ -54,7 +54,8 @@ export default class BuoyancyLabModel extends DensityBuoyancyModel {
       }, {
         tandem: this.pool.fluidTandem.createTandem( 'displacedVolumeProperty' ),
         phetioValueType: NumberIO,
-        phetioFeatured: true
+        phetioFeatured: true,
+        units: 'L'
       }
     );
   }
diff --git a/js/common/model/Material.ts b/js/common/model/Material.ts
index 0ae2feee..8e48be50 100644
--- a/js/common/model/Material.ts
+++ b/js/common/model/Material.ts
@@ -6,7 +6,6 @@
  * TODO: Add Migration processors for changes that made Material and Gravity mutable, see https://github.com/phetsims/density-buoyancy-common/issues/256
  *
  * TODO: see https://github.com/phetsims/density-buoyancy-common/issues/256 there was a bug when changing the custom density of a block in screen 1
- * TODO: see https://github.com/phetsims/density-buoyancy-common/issues/256 buoyancy.labScreen.model.pool.fluid.displacedVolumeProperty change units to L
  * TODO: see https://github.com/phetsims/density-buoyancy-common/issues/256 buoyancy.labScreen.model.block.sizeProperty has no units
  *
  * @author Jonathan Olson (PhET Interactive Simulations)