Recently I have noticed a number of brown spots appearing on the rockwork, mainly on the left-hand rock pile. To the casual observer they look similar to an infestation of planaria (eek!) but fortunately they are not. However there may come a time when I regret typing that, planaria may in fact be easier to control. I believe the spots to be a type of algae called brown wafer algae, Lobophora sp. and apparently this algae can become problematic. Manual removal is difficult and there's very little that eats it with the possible exception of a Naso tang, which obviously I'm not going to be able to introduce if needed. At this point there's not much I can do about it, short of pulling the rocks out, so I'm just going to wait and see how it progresses, I used to have some in my old tank and as far as I remember it didn't overgrow anything or cause any trouble so hopefully this will be the same. Fingers crossed!
Hi, my name is Lisa and I live in Derby, UK. I am a self-confessed reefaholic!