Lord Vishnu’s tortoise is second avatar and is called as Kurma avatar. It brings serenity, harmony, peace, long life, and money in home. It also pacifies the malefic effects of Saturn (Shani) planet and pleases Him.
Placing the tortoise in living room; helps to increase family harmony. As per Puranas, Lord Vishnu took the form of tortoise to uphold the earth and its beings during the Sagar Manthan.
As tortoise is gifted with long life therefore keeping it bestows longevity.
Usage: Fill the plate with water. Water must be enough in dish to soak the feet of tortoise. Make sure the level is maintained on daily basis. You can add some colored stones (if you have). Install the plate with the mouth of the tortoise facing west direction.