This algae has suddenly and aggressively popped up in my tank recently. It’s a fairly young g tank and I recently added 3 new fish to it. I just cleaned the sand bed but i’ve been getting firm sheets of red cyano and a green one i’m not sure of. The rest is this slime stuff you see that’s covering everything. I added new corals yesterday and it is already on them. I picked up a pincushion urchin today but i did it more because I like the invert less to clean it up (yes I will feed it i’ve kept them before). If anyone has the id and treatment for this algae that would be very helpful. I just really do not want it to kill my corals. Tahnk you!