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.
Heating your hot tub. In this article we will look at some of the different ways that you might heat your hot tub. All Sundance spas are heated with an electric heater but there are other ways of doing it. Getting your hot tub to 37deg C. Most people feel that the ideal temperature for a hot tub or spa is somewhere between 37deg C and 39deg C â which is about the same as your body core temperature. How hard any heater will have to work to get the spa up to temperature will depend on the ambient air temperature and whether a good thermal cover is fitted.