I have had this red devil for he last year or so. His tank over the last serveral months have gotten this borwn algea in it. I clean it and it goes away for like a month, then comes back. Well i thought i got rid of it for good finally untill ive been gettin all this green algea every few weeks. It really easy to clean but i was wondering if it was normal to have this happen? My water quality seems to be fine when i test it.