I changed my water 4 days ago (20%) and I use RO/DI water. I got up this morning and I have this yucky fuzzy brown stuff on my live rock. My readings are as follows:
56 gallon tank- 1 clown fish, I coral banded, I fire shrimp, 1 peppermint shrimp, 40lbs live rock
Salinity: 1.025
Ammonia: 0...