blackout

I did a 3 day blackout do get rid of my algae, only it didn't work. It got rid of most my dinos, but I still have my hair, film, and cyano algae. My problem though is with my colt coral. It is all closed up and stiff. What is wrong with it?

Hi there, This is my first time asking a question here. My 30gal tank has been up and running for about a month. I have two clowns, a wrasse, cleaner shrimp, hermit crabs and dottyback. I also have leather coral and some mushrooms and a huge hair algae/diatom problem. I've been doing water...

My biocube has become over run with cyano and hair algae and i really want to get rid of it. Im getting a 25 gallon tank tonight for free with a stand and im going to put the fish, corals and anemone in the new tank. Im going to take the hood off of my biocube and place it over the new tank so...

I have a brown algae (diatom) problem in my tank. It is from using tap water, I now use RODI, I learned my lesson. I know it can take months for the problem to clear up, but I have been reading and some suggest a "blackout" for 2-3 days and the algae should be gone. My question is: 1. any...