diff --git a/addons/api/addon/models/host-set.js b/addons/api/addon/models/host-set.js
index 9b6611bb1..c4b93e905 100644
--- a/addons/api/addon/models/host-set.js
+++ b/addons/api/addon/models/host-set.js
@@ -27,31 +27,56 @@ export default class HostSetModel extends GeneratedHostSetModel {
   // =methods
 
   /**
-   * Saves the `host_ids` array on the host set via the `set-hosts` method.
+   * Adds hosts via the `add-hosts` method.
    * See serializer and adapter for more information.
+   * @param {[string]} hostIDs
    * @param {object} options
    * @param {object} options.adapterOptions
-   * @param {string} options.adapterOptions.hostCatalogID
    * @return {Promise}
    */
-  saveHostIDs(options={ adapterOptions: {} }) {
-    const defaultOptions = {
-      adapterOptions: {
-        method: 'set-hosts',
-        serializeHostIDs: true
-      }
+  addHosts(hostIDs, options={ adapterOptions: {} }) {
+    const defaultAdapterOptions = {
+      method: 'add-hosts',
+      hostIDs
     };
-    // There is no "deep merge" in ES.
-    // All of this nonsense is here to ensure we get
-    // a decent merge of `adapterOptions`.
     return this.save({
-      ...defaultOptions,
       ...options,
       adapterOptions: {
-        ...defaultOptions.adapterOptions,
+        ...defaultAdapterOptions,
         ...options.adapterOptions
       }
     });
   }
 
+  /**
+   * Delete hosts via the `remove-hosts` method.
+   * See serializer and adapter for more information.
+   * @param {[string]} hostIDs
+   * @param {object} options
+   * @param {object} options.adapterOptions
+   * @return {Promise}
+   */
+  removeHosts(hostIDs, options={ adapterOptions: {} }) {
+    const defaultAdapterOptions = {
+      method: 'remove-hosts',
+      hostIDs
+    };
+    return this.save({
+      ...options,
+      adapterOptions: {
+        ...defaultAdapterOptions,
+        ...options.adapterOptions
+      }
+    });
+  }
+
+  /**
+   * Delete a single host via the `remove-hosts` method.
+   * @param {string} hostID
+   * @param {object} options
+   * @return {Promise}
+   */
+  removeHost(hostID, options) {
+    return this.removeHosts([hostID], options);
+  }
 }
diff --git a/addons/api/addon/serializers/host-set.js b/addons/api/addon/serializers/host-set.js
index 24d2fff60..3ce7c7161 100644
--- a/addons/api/addon/serializers/host-set.js
+++ b/addons/api/addon/serializers/host-set.js
@@ -13,21 +13,22 @@ export default class HostSetSerializer extends ApplicationSerializer {
    * @return {object}
    */
   serialize(snapshot) {
-    const serializeHostIDs = snapshot?.adapterOptions?.serializeHostIDs;
     let serialized = super.serialize(...arguments);
-    if (serializeHostIDs) serialized = this.serializeWithHostIDs(snapshot);
+    const hostIDs = snapshot?.adapterOptions?.hostIDs;
+    if (hostIDs) serialized = this.serializeWithHostIDs(snapshot, hostIDs);
     return serialized;
   }
 
   /**
    * Returns a payload containing only the host_ids array.
    * @param {Snapshot} snapshot
+   * @param {[string]} hostIDs
    * @return {object}
    */
-  serializeWithHostIDs(snapshot) {
+  serializeWithHostIDs(snapshot, hostIDs) {
     return {
       version: snapshot.attr('version'),
-      host_ids: snapshot.attr('host_ids').map(hostID => hostID.attr('value'))
+      host_ids: hostIDs,
     };
   }
 
@@ -35,8 +36,8 @@ export default class HostSetSerializer extends ApplicationSerializer {
    * Converts string arrays to object arrays for use with `fragment-string`.
    * E.g. `"foo"` -> `{value: "foo"}`
    * @override
-   * @param {Model} typeClass
-   * @param {Object} hash
+   * @param {Model} modelClass
+   * @param {Object} resourceHash
    * @return {Object}
    */
   normalize(modelClass, resourceHash) {
diff --git a/addons/api/tests/unit/serializers/host-set-test.js b/addons/api/tests/unit/serializers/host-set-test.js
index 13b6caa0b..595c6f771 100644
--- a/addons/api/tests/unit/serializers/host-set-test.js
+++ b/addons/api/tests/unit/serializers/host-set-test.js
@@ -11,7 +11,6 @@ module('Unit | Serializer | host set', function(hooks) {
     const record = store.createRecord('host-set', {
       name: 'Host Set 1',
       description: 'Description',
-      host_ids: [{value: '1'}, {value: '2'}, {value: '3'}],
       version: 1
     });
     const snapshot = record._createSnapshot();
@@ -24,7 +23,7 @@ module('Unit | Serializer | host set', function(hooks) {
     });
   });
 
-  test('it serializes only host_ids when `adapterOptions.serializeHostIDs` is true', function (assert) {
+  test('it serializes only host_ids when `adapterOptions.hostIDs` is true', function (assert) {
     assert.expect(1);
     const store = this.owner.lookup('service:store');
     const serializer = store.serializerFor('host-set');
@@ -36,11 +35,11 @@ module('Unit | Serializer | host set', function(hooks) {
     });
     const snapshot = record._createSnapshot();
     snapshot.adapterOptions = {
-      serializeHostIDs: true
+      hostIDs: ['4', '5']
     };
     const serializedRecord = serializer.serialize(snapshot);
     assert.deepEqual(serializedRecord, {
-      host_ids: ['1', '2', '3'],
+      host_ids: ['4', '5'],
       version: 1
     });
   });