Lookin g for some help or insight to what he may be. Noticed during my monthly water change one of my rocks starting to have this fuzz on it. Is it broypsis or red algae? Easily brushed off the rock I had it on. Numbers are all good and nothing has changed in the tank. I know it's not the best pics but just looking for others thoughts. Looks worst in the bag than it did on the rock lol.