diff --git a/js/concentration/model/ShakerParticle.js b/js/concentration/model/ShakerParticle.js
index b08d0d8d..82b55c3e 100644
--- a/js/concentration/model/ShakerParticle.js
+++ b/js/concentration/model/ShakerParticle.js
@@ -38,7 +38,6 @@ define( function( require ) {
     this.solute = solute;
     this.velocity = initialVelocity;
     this.acceleration = acceleration;
-    this.shakerParticleTandem = tandem; // Used in TShakerParticle to serialize the tandem name
 
     tandem.addInstance( this, TShakerParticle );
 
diff --git a/js/concentration/model/TShakerParticle.js b/js/concentration/model/TShakerParticle.js
index 2ae169f4..4cd903aa 100644
--- a/js/concentration/model/TShakerParticle.js
+++ b/js/concentration/model/TShakerParticle.js
@@ -39,7 +39,6 @@ define( function( require ) {
         orientation: TNumber.fromStateObject( stateObject.orientation ),
         velocity: TVector2.fromStateObject( stateObject.velocity ),
         acceleration: TVector2.fromStateObject( stateObject.acceleration ),
-        shakerParticleTandem: TTandem.fromStateObject( stateObject.tandem )
       };
     },
 
@@ -49,8 +48,7 @@ define( function( require ) {
         location: TVector2.toStateObject( value.locationProperty.get() ),
         orientation: TNumber.toStateObject( value.orientation ),
         velocity: TVector2.toStateObject( value.velocity ),
-        acceleration: TVector2.toStateObject( value.acceleration ),
-        tandem: TTandem.toStateObject( value.shakerParticleTandem )
+        acceleration: TVector2.toStateObject( value.acceleration )
       };
     }
   } );