Tap the :Add: button. I bought a fish tank today with 10 fish in it. Move the fish at the bottom to show how my fish tank looks. You can choose how many of each color you have as long as I only have 10 fish. Delete the fish you don't use. Complete the chart by using the tool to write the fraction of each color in the tank. Record about my tank using the tool. Tap the to post to your journal.