I was doing a water change in my 5 1/2 gal baby guppy tank and I noticed in the corner where my filter is at the top where my water stops is some red stuff..I dont know what this is!!!
Is this a type of Algae? What caused it? Will it hurt my baby fish? I have never had a problem with algae, and the only algae I know of is the green, I have never seen RED...I have 3 patches of it one in the corner and 2 on the sides of it...If anyone can help please do, I am very worried!!! 
