I have a 55 with liverock,sandbase and algae. The fish iin question isa sgt major damsel. He was the original fish 1.5 yrs ago.He did not die. I have just treated my tank which consist of yello tang, scooter bleeny, 2 green chromas, hermit crab, brittle star and a variety of snails and mussels.The treatment was a phosphate sponge to kill all the red velvet algae. Since that has died I have a large amount of green hair growing. I am leaving tomorrow for a seven day trip with someone feeding the tank. Anyon have any advice on how to immediatly reduce the algae and what is going on with my swollwn damsel.