diff --git a/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts b/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts
index 236c846d..9b5d838b 100644
--- a/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts
+++ b/js/buoyancy/view/applications/BuoyancyApplicationsScreenView.ts
@@ -158,6 +158,7 @@ export default class BuoyancyApplicationsScreenView extends BuoyancyScreenView<B
         visibleProperty: new GatedVisibleProperty( customDensityControlVisibleProperty, customBottleDensityControlTandem ),
         sliderOptions: {
           accessibleName: DensityBuoyancyCommonStrings.densityStringProperty,
+          phetioLinkedProperty: model.bottle.materialInsideProperty.customMaterial.densityProperty,
           thumbNode: new PrecisionSliderThumb( {
             tandem: customBottleDensityControlTandem.createTandem( 'slider' ).createTandem( 'thumbNode' )
           } )
diff --git a/js/common/view/FluidDensityControlNode.ts b/js/common/view/FluidDensityControlNode.ts
index 191db247..ab717933 100644
--- a/js/common/view/FluidDensityControlNode.ts
+++ b/js/common/view/FluidDensityControlNode.ts
@@ -66,7 +66,7 @@ export default class FluidDensityControlNode extends ComboNumberControl<Material
             font: DensityBuoyancyCommonConstants.COMBO_BOX_ITEM_FONT,
             maxWidth: 160
           } ),
-          tandemName: `${material.tandem.name}Item`,
+          tandemName: `${material.tandem.name.replace( 'Material', '' )}Item`,
           a11yName: material.nameProperty,
           comboBoxListItemNodeOptions: {
             visible: !options.invisibleMaterials.includes( material )
diff --git a/js/common/view/GravityControlNode.ts b/js/common/view/GravityControlNode.ts
index 730826b9..3fceada3 100644
--- a/js/common/view/GravityControlNode.ts
+++ b/js/common/view/GravityControlNode.ts
@@ -46,7 +46,7 @@ export default class GravityControlNode extends ComboNumberControl<Gravity> {
             font: DensityBuoyancyCommonConstants.COMBO_BOX_ITEM_FONT,
             maxWidth: 160
           } ),
-          tandemName: `${gravity.tandem.name}Item`,
+          tandemName: `${gravity.tandem.name.replace( 'Gravity', '' )}Item`,
           a11yName: gravity.nameProperty
         };
       } ),
diff --git a/js/common/view/MaterialControlNode.ts b/js/common/view/MaterialControlNode.ts
index 39cec0b5..a5c50177 100644
--- a/js/common/view/MaterialControlNode.ts
+++ b/js/common/view/MaterialControlNode.ts
@@ -83,7 +83,7 @@ export default class MaterialControlNode extends VBox {
           font: DensityBuoyancyCommonConstants.COMBO_BOX_ITEM_FONT,
           maxWidth: comboMaxWidth
         } ),
-        tandemName: `${material.tandem.name}Item`,
+        tandemName: `${material.tandem.name.replace( 'Material', '' )}Item`,
         a11yName: material.nameProperty
       };
     };