Quote:
Originally Posted by Derekyap
Yup. Cycle for one week before introducing the Ranchu. Any idea how long it will take for the 2 ft tank to properly cycle?
Does UV filter slow down the process of BB formation?
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Yes. UV at high dwell time will sterilize both good and bad bacteria.
Check the pH of your aquarium water. If it's over 7, the ammonia is hazardous to your fish. Evidently, the dark spots on their bodies are probably signs of healing from "ammonia burn".