Just walked in the door and noticed the whole back of my tank is covered in this brown fuzzy stuff on the sand bed and rock. I do have 3 clowns in there... Any idea what it could be and could it be harmful to my fish???
Diatom. Time is ur ally here. Ur going thru an algae cycle. One of the early ones. Standard rules apply. Wc and limit nourishment, ie food n lights. It'll b gone soon. Nows a good time to look at ur cuc. Matt