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.
8. On a once-weekly basis you will need to: shock your hot tub. Add 2-3 tbs of shock with the jets running and wait 15 minutes. THEN test the water for bromine, pH, and alkalinity levels with your test kit or test strips.In general, you want your bromine level at 3-5 parts per million.. On a once-weekly basis you will need to: shock your hot tub. Add 2-3 tbs of shock with the jets running and wait 15 minutes. THEN test the water for bromine, pH, and alkalinity levels with your test kit or test strips. In general, you want your bromine level at 3-5 parts per million.