document updated 16 years ago, on May 18, 2007

nitrogen cycle
- ammonia ⇒ nitrite (via nitrosomonas)
- nitrite ⇒ nitrate (via nitrobacter)
- nitrate ⇒ ??
cycling an aquarium (eg. building up a desired colony of the above bacteria)
- The Nitrogen Cycle
- fishless (
ammonia sensors
- lead1, theory, example1, white paper
nitrite sensors
nitrate sensors