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.
Water temperature. The temperature of a hot tub should never be hotter than 40Â°C (104Â°F). Staying or bathing in hot water for a long time can cause severe heat-related illnesses, such as nausea, dizziness or fainting, and even death.Avoid staying in the hot tub for more than 10 minutes at one time.ater temperature. The temperature of a hot tub should never be hotter than 40Â°C (104Â°F). Staying or bathing in hot water for a long time can cause severe heat-related illnesses, such as nausea, dizziness or fainting, and even death.