My 75 gallon tank has been cycled about 2 months now. I have dry rock all in my tank and I added 1 live rock with full PURPLE coverage. Every frag I have added had and still has PURPLE coralline on it. But I am starting to see RED spots on my dry rock. Is the red algae going to turn purple? Or stay red?
(it is not cyano)
(it is not cyano)