MOST being key here. where do you get your info. all the info u submitted is about reefs. shut your mouth about how it is UNSAFE. why dont you go put your tank in a window and put a few hundred watts of full spectrum light over it and take a pic in a few months. you WILL get hair algae, and then i want you to tell me how many of your fish died from the DANGEROUS situation. You apparently know NOTHING about fish tanks and the whole nitrogen cycle and its management. Find me info that says getting hair algae in a fresh water tank or any saltwater tank other than a reef is dangerous to the fish. and how do you even know the fish were there before the algae. Oh by the way. NO NO NO and I mean NO PET-MART info please you donkey. and tell me this, is ALL hair algae the same. I THINK NOT. what you would have in your reef and what i have in my freshwater tank are two completely different species of algae. Plants use nitrates as food. is your tank nitrate free. and if you are worried about the phosphates and silicates, again ill say you only get your info from a reefer. I have kept fish since childhood and worked at 3 very reputable lfs' 2 in san diego and 1 in phoenix. NEVER have i had a problem from letting some hair algae grow in my tank, and my fish have always consumed the stuff, so WHATS SO DANGEROUS. Dont just say it is dangerous, i want you to come up with facts. These days I hear so many people talking about their fish getting bloat. THE CAUSE way too much protein. Every week when my fish are "FASTING" for 2 days, most of the algae in my tank is consumed. And besides man, im not wasting anyone but YOURS and MY time, seein as we are the only 2 involved in this conversation, so save your breath, the rest of the MFK members WONT save you or your time. if your not man enough to do it yourself then step off.......THATS HOW YOU DO IT........THATS HOW YOU DEBATE.!!!!!!!!!!