"Donegal Paul" wrote in message
...
OK, this is in our third tank and ive only had all three running for about
2 to 3 months.
Ive had normal growths of green algae in the other two, but maintenence
and snails and shrimps keep it all under control.

However, in our tank upstairs there was a small (2cm) spot of brown on the
inside of the front glass last week. I wiped it off thinking that it was
just dirt.

However, there are several more growing near the same spot now so does
anyone know what this is and how to deal with it??

Algae or cyanobacteria. For lots of info,
go to http://www.thekrib.com/Plants/Algae/

Limnophile