Apr 27, 2011 #1 C craig_will2513 Aquarium Advice Freak Joined Jan 1, 2011 Messages 412 Location crewe cheshire uk can anyone tell me what this is please its growing in my tank. itsred in colour Attachments thing 1.jpg 3.1 KB · Views: 60 thing.jpg 6.5 KB · Views: 62