Mudras to deal with acidity

Jal shaamak (Water destroying mudra): Fold the little finger down with the thumb. For each hand. Stop the practice when the acidity is controlled.
Kapha Kaarak (Earth increasing hand gesture) mudra: Tips of little finger and ring finger touchingtip of thumb.  For each hand. Stop when acidity is controlled. (Also called Prana mudra, because it improves vitality all around).
Prithvi vardhak (Increasing the earth element hand gesture) mudra: Tip of ring finger to touch tip of thumb for each hand.