Algae Or Fungus Id

[star4]

Sorry I dont have a picture at the moment. I have a piece of mopani wood that I have had in various tanks now for a couple of years. Now its been in a tank in the conservatory for a couple of weeks and something weird has grown on it. I thought to start with that it was a vegi flake, but its grown and spread, It has a whitish outer ring with darker green in the middle exactly the same as lichen, but I have never heard of underwater lichen before. Anyone with any ideas??

 

[Zikofski]

would be great if you can get a picture for us then we can ID it 100% or close to, if it is an algae then it may be on this site that i highly recommend you look at and see if its listed if not then it maybe a fungi
 
http/www.theplantedtank.co.uk/algae.htm

 

[star4]

None on that link, Finally got my camera working...
 

 
This wood has been in my tanks for 3-4 years and in a friends tank prior to that. It is on this wood and now on some rock too???