Srivaishnava households can have conch at home. No need to perform a separate aradhanam for the conch. If we had purchased a valampuri shanku, it must be kept clean and can be used for tirumanjanam during Perumal Tiruvaradhanam.
Some households would have specially consecrated Shankam, Chakram, Sudarshana Panchajanya for which specific rules are applicable for daily aradhanam.