Average Hourly Cost: The average hourly cost of pool chemicals for an indoor swimming pool is around $50-$75.

Cost Breakdown: The cost of pool chemicals depends on the type of chemicals being used and the size of the pool. Generally, the cost of the chemicals will be around $15-$30 per gallon, depending on the type and quality of the chemical. Additionally, the cost of labor to add the chemicals to the pool can range from $15-$50 per hour, depending on the complexity of the job.

Factors Affecting Cost: The cost of pool chemicals can be affected by several factors. These include the type and quality of the chemicals, the complexity of the job, the location, and the service provider. Additionally, the size of the pool and the frequency of chemical treatments can also affect the cost.