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.
However, the water in the hot tub needs to be empties and the tub cleaned periodically. When a hot tub is refilled, it should take over night to heat up. Some outdoor hot tubs take up to two days to heat up in the summer. If your hot tub is slow to heat up, you need to examine all the things that could cause this problem. 1. Filter Frequently, the hot tub takes longer to heat up not because of a heating element problem but because of clogged filters.