The first inequality means that the distance between x and c is greater than 0 and that x â  c, while the second indicates that x is within distance Î´ of c. Note that the above definition of a limit is true even if f(c) â  L. Indeed, the function f need not even be defined at c.
Once inside a hot water heater, however, Legionella bacteria multiplies and is conveyed through the household plumbing, where it may be inhaled in the aerosol mist that accompanies showering, bathing or even washing dishes in a sink. Very young children and elderly people are particularly at risk.
Detergents carried in on swimsuits are a common cause of foamy hot tub water. Lotions, hair care products and other body products can also cause foamy water. However, foamy water may also be a sign of low sanitizer levels. To reduce or prevent foamy hot tub water, stick to a careful water maintenance program. Itâs also a good idea to rinse guestsâ swimsuits before a dip in the hot tub.