I have recently started my tank and its still in the cycle process. I have a 220g DT with a 90g sump. I started cycling the tank Dec 1. brought the ammonia up to 1.0 ppm and let it drop. Since then all my levels are low and started dosing Stability. The lights have been off for the whole cycle sofar. I decided to turn the lights on tonight and found this growing on my rock. The rock and sand was dry. The rock got a bleach bath for 3 days and rinsed soaked with RO water for a few days (with water change ). I was wondering if someone could help me out.
