Smarter Swimming Pool 4: Liquid Chlorine Level

My pool requires a regular influx of liquid chlorine that is stored in a large drum next to the automated chlorinator. Every couple of weeks I have to replenish that drum, otherwise the chlorine concentration in the pool water gets too low, and algae starts growing resulting in green-ish pool water. Needless to say, this has already happened a couple of times in the past and each time I had to pour in more chemicals to clean up the mess and wait a few days until the water was clean again.

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