twallen152
Aquarium Advice Newbie
Hey, I am only 2 months in on owning a saltwater aquarium and need a little help. I have a 55 gallon and I used dry reef rock and live sand with dr Tim's bacteria to start my tank. My parameters r good but my rock is getting brown spots that r spreading fast. I showed pic to my local aquarium guy and he said if I cant rub it off with my finger it is probably the start of coralline algea. Well it is not coming off so wanted to get someone else's thoughts. He said it would turn from brown to purple and had me dosing with calcium now. Pic attached Thanks