Red Algae Problem

Hi,


I've had a freshwater 10G tank for about a year now. A month or two
after I got the tank red algae (I assume that's what it is) appeared on
the sides of the tank and on the plastic plants (there are no real
plants).


I use a toothbrush to scrape it off the sides of the tank - it comes
off quite easily. Occassionally I'll take out the plastic plants and
wash them in warm water. Again, the red slime comes off easily.


The tank has a flourescent light, though we turn it on infrequently (30
minutes per week).


I've been trying an anti-algacide additive that I purchased at my local
pet store about once per week for the last month - no real help.


Here are some pictures of the tank:


http://www.deercove.org/fishta=ADnk.htm


Any help greatly appreciated!=20
Rob.