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.
If you might be pregnant and plan to use a hot tub, or you choose to use a hot tub during pregnancy, take these steps to reduce the risks: 1  Limit time in the hot tub to less than 10 minutes.2  Avoid sitting near the inlet that provides newly heated water. Avoid spending time in the hot tub once a week or more. 2  Get out of the hot tub if you start to sweat or feel any discomfort. 3  Stay out of the hot tub if you aren't in good health or you already have an elevated temperature due to fever, exercise, or previous hot tub or sauna use.