Quote:
Originally Posted by rayjay
You can check the capability of the biological filter by CHALLENGING it.
Add some ammonia until you get a reading of about 6ppm ammonia and see how long it takes to clear. If it clears overnight, the cycle is ready.
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Sounds like a fun experiment. The nitrogen cycle has been complete for several months now in the rock bin, but it would be interesting to see the actual capacity of the bacteria population. Thanks for the input.