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.
Indian Army is the 3rd largest in the world and so its very nice that you wish to join it. There are 3 basic entry schemes in the Indian Army. The age limits for the NDA exams are 16.5 to 19 years. The age limits for the CDS exams are : 21-25 years, but for the IAF entry through this the age limit is 18-23 years.