Replanting my snake plant

I had not replanted my snake plants for two years. Chinese New Year is coming, so it is time to have a new vibe by replanting my snake plants and giving them fresh soil.
I have two big pots of snake plants. They have been growing in the same soil for two years. The soil was old, so it was time to change it and add some fertilizer.
There was also a layer of pebbles on the surface of the pot. The stones had become dirty, so I soaked them in diluted bleach. After they turned clean and white, I washed them with water and let them dry. When they were completely dry, I put them back on top of the soil.