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.
Typically, a hot tub or spa will heat the water somewhere between 3 and 6 degrees per hour. First, letâs examine the ambient temperatures. Basically, that is the temperature where your hot tub is located. The warmer it is outside, the less time it will take it to heat. For example, if it is 76 degrees outside and you want to heat your hot tub to 100 degrees, it will take your hot tub approximately 4 hours to reach its temperature. You can decrease that time if you keep your hot tub cover on while it heats.