You can select from manufactured decorations or organic decorations (both dead and living) for freshwater aquarium. The following list show you what is available:

Manufactured decorations:
• fake plants (plastic or silk)
• fake rocks (plastic or ceramic)
• fake wood (plastic or ceramic)
• o novelty items (plastic or ceramic castles, divers, etc.)

Organic (dead):

• Driftwood
• Real rocks
• Substrates (gravel, beach sand, river sand, coral sand, and peat are popular choices)

Organic (living)

• Live plants