Keeping things clean

We have been cleaning our biofilter and tank. 

We noticed that as the fish are growing we need to keep the water and tank as clean and healthy as possible. 

When we took our filter apart we saw all the different types of filtered that help keep the tank and water healthy. There was wool, gauze, rocks and plastic balls. 

The filter had stopped lots of excess food and fish poo from going back into the tank.