hey i have some red alge starting to form on everything. i have heard of this before and how to get rid of it but i dont remeber now how to get rid of it. and i have no idea where it came from i have not adding anything to the tank for at least three months for this to enter my tank from the store. so its at the beging stage right now and i would like to try and knock it out asap. so if you know how to treat it let me know. thanks in advance.