HT Hot Tub Chemicals HT Chemicals are Made Right Here in the USAWe have supplied Chemicals to the Industry since 1999. HT Chemicals include the highest concentrates available in the industry and maintain a high level of consistency in the production process. These qualities help you minimize the volume of chemicals required and assure you that the amount needed won’t change with each order you receive. HT Chemicals have NEVER been available through Mass Merchants or Large Online Companies. To meet their pricing needs these companies often require the need to dilute liquid chemicals and add fillers to granular products. We pride ourselves in standing firm on quality and remain committed to the distribution of our chemicals only through local hot tub dealer and service organizations.