So this algae has grown in the past couple days, any ideas a way to get rid of/prevent it? i am new to saltwater tanks so not sure if snails/crabs will help too much, and there is a gsp in the same tank that has been having algae grow on it which is what im assuming is the reason why it isn't opening up anymore but i would like some input from more experienced people 
http://imgur.com/a/aUEHx
http://imgur.com/a/aUEHx
