Catappa bark differs from Catappa leave as the bark will immediately sink to the bottom of the tank. It will gradually release nutrients for shrimps and fish. In addition, it serves and habitats for shrimps. The barks will become soft if left soaking in water for over 5 days, which then will become a great shrimp food source.
Catappa bark sticks are 0.8-1 cm wide and 8 cm long. Use 1 piece per 20-30G.
1.Boil about 10-15 minutes. Let them cool.
2.Put into the fish tank as food for shrimps.
Tantora Bark Review - http://www.practicalfishkeeping.co.uk/content.php?sid=6140