Â· Modern Use. Today, basalt is used to a lot of things. Most common use of. is as aggregates. Basalts that are crushed are used for construction purposes, like asphalt paving, concrete aggregate and rock filtering agents. Basalts are added as aggregates to increase strength to concrete. Modern Use. Today, basalt is used to a lot of things. Most common use of. is as aggregates. Basalts that are crushed are used for construction purposes, like asphalt paving, concrete aggregate and rock filtering agents. Basalts are added as aggregates to increase strength to concrete.
Typical filtration cycles are four hours, twice per day (for hot tubs operating a single or two speed pump). Reducing the cycles to 3 hours twice per day will save water pumping energy. These circulation times should be set for off-peak hours. (Some hot tubs have small, low wattage circulating pumps that run 24 hours a day. Typically these draw less energy than a 100 watt light bulb.
In addition, this circuit is turned on and off by a 24VAC line controlled by an irrigation timer. In this way, I can make sure that the hot tub will not turn on during certain times of the day. My hot tub has a very basic controller circuit. It is programmed to filter the water every 12 hours for 2 hours duration.In addition, it will monitor the temperature of the water and turn on the heater if it drops below the value set by the front panel controls.n addition, this circuit is turned on and off by a 24VAC line controlled by an irrigation timer. In this way, I can make sure that the hot tub will not turn on during certain times of the day. My hot tub has a very basic controller circuit. It is programmed to filter the water every 12 hours for 2 hours duration.