When a piece of Hydroplate armor is worn, making any contact with Water or Candied Water will heal the player's health, at a rate of 0.25 (×0.125) health healed per second. Wearing more pieces of Hydroplate armor will further increase the health regeneration, to increments of 0.5 (×0.25)/0.75 (×0.375)/1 (×0.5) health healed per second- depending on how many pieces are worn.
Wearing a full set of Hydroplate armor will reduce most types of damage by 20% if the player is in contact with Water or Candied Water. The main exceptions to this are environmental sources of damage- Fire, Cactus, suffocation, Lightning, etc.
Hydroplate Armor can be obtained as a drop from the following mobs: