hi guys there is brown stuff growing on my white gavel rocks but not my blues rocks its not rly bad its only growing on a handfull of garvel all around the tank

sounds like it might be brown algae or maybe hair algae, can you post a pic so we can be sure of what it is. How long do you have your lights on for? Does the brown stuff look like hair or is it a thin covering

it looks thin not like hair

pics would be helpful matey, so we can diagnose the problem

that sounds alot like hair algae, which grows in one of my old tanks, and yeah, it always seems to grow off a white rock or piece of gravel before it grows off the other stuff. i have no idea why, i assume because it reflects more light, thus the algae grows better there, i dont know for sure tho.

fredmsi wrote:


sounds like brown algae. how long has your tank been set up, how long do you have your lights on for?