hair algae

I was gone from my 40 gallon salt water tank for roughly a month due to personal reasons. It was kept at my parents house however they didn't do much besides add one cube of frozen food a day. All my animals are alive and acting well however (now that I am back), I've noticed a lot more...

I have a 5g reef tank that has mixed corals - soft, lps and sps corals. I have been feeding the corals phytoplankton and putting a couple of grains of pellet food in there every now and then. Over the last few weeks, my tank has developed a hair algae problem. Also, my flame scallop passed away...