I purchased an awesome ELOS 120 rimless 80g from a local reef club member who bought it new 7 or so years. After getting it home and beginning to clean it up I noticed what looks to be some algae that got behind the seam on both sides. Is this anything to be worried about or am I panicking over nothing. The glass is thick and so is the silicone but I want to be better safe than sorry. What are y’all’s thoughts??