If you haven't changed the bulbs in over 1 year the color spectrum may
be changing which could enhance more algae growth.

--

Mark
http://www.cichliddomain.com


"Wm Hopkins" wrote in message
ink.net...
I've had my tank up and running for 2+ years and in the last month
an odd
(for me) algae has started. It grows in small circles and is bright
green.
Never higher than 6" from top of tank and hard as all get-out to
clean off -
usually requires a razor blade. Very slow growing. Lighting is 2x55W
CF
5300K over a 110 African tank. Nitrate is ~10 Ammonia and Trite are
undetectable. Any ideas?

TIA,

Bill

--
______________________________________________
"Luge strategy? Lie flat and try not to die."
--Carmen Boyle (Olympic Luge Gold Medal winner - 1996)