Insert the filter hose into the attachment on the side of the pool. Refer to the installation guide that came with your pool for exact instructions, since every pool setup is slightly different.
Open the top of the filter and insert the paper filter cartridge. Close the top of the filter.
Add the recommended pool chemicals to the water. Refer to the user guide that came with your pool for the recommended mix of chemicals in your newly set up inflatable pool.
Plug the filter in and run it for at least eight hours to run the chemicals through the water. Use a pool water test kit to ensure the proper balance of chemicals before using the pool.