Sometimes you may experience foam in your hot tub. There are many things that can contribute to foam. Don't fret, foam is a common enough occurrence and can be dealt with especially if you regularly maintain your hot tub. There are products on the market that deal with foam and will reduce the bubbling foam.
There are technically no specific age requirements for soldiers seeking to become Army Rangers. Thus, the effective age limits are the same as those required to join the Army in the first place. Applicants must be at least 17 years old (or 18 without parental permission) and no older than 41 years old.
From 1954 to the early 1970's, the Army's goal, though seldom achieved, was to have one Ranger qualified NCO per infantry platoon and one officer per company. In an effort to better achieve this goal, in 1954 the Army required all combat arms officers to become Ranger/ Airborne qualified. The Ranger course has changed little since its inception.