Hello,

I am having a big problem with this stuff on the glass of my aquarium. From another forum they mentioned it could be coralline algae. Maybe you will be able to clarify. Is it? If so, how can I keep it from coming back on my aquarium gl***** These pics are from when I went away on vaction and came back after 2 weeks. I would say it had about 3 weeks to grow to this point. I scraped it off with a razer blade and now its already growing back quickly.

My setup is a 75g hex, ~25g sump with refugium, 150g skimmer, metal halide light, RO/DI water setup and ~110lbs of Live rock. It has soft coral, fire fish, flame angel, goby and some snails. Tank has been setup for 9 months.