# Add and delete host pool members

A VDI pool can contain different types of members. These could be all available hosts, specific hosts, and hosts created from a template.

## **Adding a member to a host pool**

To add a member to a pool:

1. Double-click a pool in the **Host pools** list.
2. Select the **Members** tab.
3. Click the plus (**+**) button and choose a member type from the following list:
   * **All hosts in provider**. All hosts that are located on a given Provider. After clicking this options, you'll be able to select a Provider.

     **Note:** Parallels does not recommend to use this type because there's a possibility that hosts with unsupported OS will be added (e.g. Linux, HALB etc). If you need to use this type, please do it carefully or use a [wildcard with appropriate hosts names](/landing/ras-admin-guide/v19-en-us/parallels-ras-19-administrators-guide/virtual-desktop-infrastructure-vdi/manage-vdi/manage-host-pools-vdi/using-a-wildcard-to-filter-vms.md).
   * **Host**. A specific host located in the Farm. After clicking this options, you'll be able to select a host from the list.
   * **Resource pool**. A group of hosts that were natively configured in the hypervisor as a pool. Please note that a hypervisor may use a different term for pools (e.g. "resource pools"). After clicking this option, you'll be able to select a resource pool from the list, if any are available.
   * **Template**. Hosts that are automatically created from a template. After selecting this option, you'll be able to select a template. For more information about templates, refer to [**Templates**](/landing/ras-admin-guide/v19-en-us/parallels-ras-19-administrators-guide/virtual-desktop-infrastructure-vdi/manage-vdi/manage-templates-vdi.md).
4. After you click one of the above menu items, you will be presented with the list of the available hosts, hosts, or templates from which you can make your selection.

{% hint style="info" %}
**Note**: To avoid issues with overlapping members, a given pool can have members of the same type only. For example, if the first member that you add to a pool is a host, any additional member can be a host, but not a template, Resource pool, or all hosts on a specified host. If you want to use members of different types, you must create a separate pool for each member type (i.e. one pool for hosts, another pool for templates, etc.). This requirement is enforced in the UI by disabling the member type choices once the first member is added to a pool.
{% endhint %}

## **Removing a member from a host pool**

To remove a member from a pool:

1. Double-click a pool in the **Host pools** list.
2. Select the **Members** tab.
3. Select the pool member that you wish to delete.
4. Click the minus (**-**) button.

When a member is removed from a host pool, it is deleted.


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