Overall, arrowhead plant care is quite easy. The arrowhead plant should be allowed to dry out between waterings.
General Care
 
Sunlight
Medium to bright light. Tolerates low light. Not suited for intense, direct sun.
Water
Allow soil to dry out halfway between waterings. Increase frequency with increased light.
Humidity
Tolerates average home humidity. Prefers high humidity. To keep your Arrowhead happy, create a wet pebble tray underneath or incorporate a humidifier into the space.