ok, i have been in california for 2 days. and i come home to a crashed 5.5 gallon, well, not totally crashed, but i came home to my only zoa frags in the tank dead, and algae every were! It is all over the rocks and walls of the tank. I have no idea what happened, luckly the mantis is still alive, but all of this algae is horrible. I just did a 50% water change when on thursday. and i did another one right now. The algae is still covering the rocks, but isnt growing as fast. Any other secrets to getting rid of this ugly green stuff before i start to go insane?